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J

J.k.kavyadharshini 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Similarity

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C

Chandra replied | 27/11/2016

When sum of two angles is 90 degree, then each angle is called complementary of each other. Say one angle is of 40 degree, then its complementary angle will be of 50 degree.
When sum of two angles is 180 degree, then each angle is called supplementary of each other.say one angle is of 70 degree then its supplementary angle will be of 110 degree.

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Nitish replied | 28/11/2016

Supplementary angles are two angles whose measures sum to a 180 degrees and complementary are the sum have to add up to 90 degrees.

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B

Baby 11/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Sales Tax and VAT

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Aarti replied | 22/12/2016

Value Added Tax.

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CA Prashanth replied | 29 Mar

Value Added Tax:-
VAT is local sales tax. It is levied and collected under state laws. VAT has replaced the earlier sales tax system.

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S

Soumya 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Annuities

Suppose that I am trying to borrow money from you to finance my business, and I promise to repay you Rs. 1,000 quarterly for two years. If your opportunity cost of funds is 10%, how much are you willing to lend me?

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Anurag replied | 06/12/2016

Rs. 1200.

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Saurabh replied | 08/12/2016

Rs. 7170.2.

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K

Kirti 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Annuities

Jim makes a deposit of Rs. 120 every week (beginning next week). The deposit is to earn interest annually at the rate of 9 percent. How much will Jim have on deposit at the end of seven years?

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S

Sandeep replied | 08/12/2016

Only science.

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Suprita replied | 08/12/2016

Rs. 47612 approx.

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D

Dev 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Annuities

What is the value a perpetuity of $400 per year (r = 14.9%)?

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Kumar replied | 21/11/2016

$ 459.60

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Rajendran replied | 24/11/2016

(400/14.9) * 100 = $ 2684.56.

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G

Guruprasad 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Symmetry

A solid that has only one vertex_______?

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Chandan replied | 05/12/2016

A cone has one vertex.

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N

Naveen replied | 12/12/2016

A cone.
There could be several other solids also as:-
1. a combination of hemisphere & a cone
2. a combination of cylinder & a cone
3. combination of frustum & a cone

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S

Soumya 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Symmetry

What is the object called where a solid that has two opposite identical faces and other faces as parallelogram?

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Barkha replied | 07/12/2016

A prism, by diagram above, has two opposite identical faces and the other 3 sides are parallelograms.

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N

Naveen replied | 12/12/2016

Prism.

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M

Milan 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Symmetry

The corners of solid enclosed by edges is called___?

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Khushbu replied | 01/12/2016

Vertex

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Nisarg replied | 01/12/2016

Vertices

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C

Chitra 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Symmetry

Is it true that order of rotational symmetry of a semi circle is two?

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Ram Sharma replied | 23/11/2016

Yes.

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N

Naveen replied | 12/12/2016

No.

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M

Mohammad 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Symmetry

Is it true that a cylinder has no vertex?

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Vidya replied | 12/12/2016

No.

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N

Naveen replied | 12/12/2016

Yes.

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K

Krishna 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Symmetry

By what minimum angle does a regular hexagon rotate so as to coincide with its original position for the first time?

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Tapas replied | 28/11/2016

60 degree or pi/3 radian.

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N

Naveen replied | 12/12/2016

60 degree.
360/(number of sides) = 360/6 = 60 degrees.

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R

Rajeswary 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Symmetry

Draw a triangle whose sides are of lengths 4 cm, 5 cm and 7 cm?

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Ankit replied | 09/12/2016

First draw a base line of 7 cm. Then take a measurement in compass of 4 cm using scale. Draw an Arc from one of the end point of the base line. Repeat the same procedure for 5 cm from another end point of base line. Draw two lines to both ends from the mid point of the Arc.

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N

Naveen replied | 12/12/2016

First draw a base line, say AB, equals to one of the measurement given. Then take measurements equal to the other two sides & draw Arcs from point A & B respectively. Join the point of intersection, say C, of both of the arcs from A & B. ABC is the required triangle.

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A

Abishiek 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Symmetry

Which capital letters of English alphabet have no line of symmetry?

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Kumar replied | 21/11/2016

F, G, J, L, N, P, Q, R, S, Z

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Vamshi replied | 21/11/2016

Some letters like F,G,J,L,N,P don't have symmetry.

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M

Mayur 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Reflection

Name the location of the point in the plane: (-3, 5)?

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Chilla Rajesh replied | 12/12/2016

2nd quadrant

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N

Naveen replied | 12/12/2016

Second quadrant.

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P

P 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Reflection

Define Reflection with respect to coordinate geometry?

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Jyoti replied | 06/12/2016

In Mathematics, a reflection (also spelled reflexion) is a mapping from a Euclidean space to itself that is an isometry with a hyperplane as a set of fixed points, this set is called the axis or plane of reflection.

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A

Ankit replied | 06/12/2016

In coordinate geometry reflection is given as below
1. Reflection about X-axis:
In this all the points (x,y) go to the points (x,-y). i.e. the plane above X-axis gets mapped below X-axis & vice versa.
Example: If P(1,3) is a point in 1st quadrant then under reflection about X-axis it goes to P*(1,-3) in 4th quadrant.

2. Reflection about Y-axis:
...  more»
In coordinate geometry reflection is given as below
1. Reflection about X-axis:
In this all the points (x,y) go to the points (x,-y). i.e. the plane above X-axis gets mapped below X-axis & vice versa.
Example: If P(1,3) is a point in 1st quadrant then under reflection about X-axis it goes to P*(1,-3) in 4th quadrant.

2. Reflection about Y-axis:
In this all the points (x,y) go to the points (-x,y). i.e. the plane on the right of Y-axis gets mapped to left of Y-axis.
Example: If P(1,3) is a point in 1st quadrant then under reflection about Y-axis it goes to P*(-1,3) in 2nd quadrant.

Similarly, we can define reflection about the lines y=x, y=-x.
In General, we can define reflection about any line in plane. «less

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U

Usha 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Reflection

If the perpendicular distance of a point P from the x - axis is 5 units and the foot of the perpendicular lies on the negative direction of x - axis, then the point P has____?

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Daljit Kaur replied | 04/12/2016

x coordinate negative.

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N

Naveen replied | 12/12/2016

Coordinates (-a, 5), where a is some positive integer.

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S

Sai 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Reflection

Abscissa of a point is positive in _____?

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P.v.ramana replied | 21/11/2016

i and iv quadrants of a rectangular plane.

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Chandan replied | 05/12/2016

1st and 4th quadrants of a rectangular plane.

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D

Durgesh 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Reflection

Plot the points A(1, -1) and B(4, 5)?

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Keya replied | 08/12/2016

Check the answer here.

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Mamata replied | 10/12/2016

A (1,-1) lie on 4th quadrant and B (4,5) lie on 1st quadrant.

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S

Santosini 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Reflection

Define reflection symmetry?

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Kapil replied | 20/11/2016

One half of the reflection is of the other half is defined as reflection symmetry.

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Kumar replied | 21/11/2016

All points are equidistant from line of symmetry.

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N

Navneet 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Reflection

What is line of symmetry?

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T Raghavender replied | 25/11/2016

It's a line passing figure on a plane and dividing it into two parts such that one part is mirror image of the other part.

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Chandan replied | 05/12/2016

The "Line of Symmetry" (shown here in white) is the imaginary line where you could fold the image and have both halves match exactly.

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K

Kunal 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Similarity

Define SAS axiom?

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Naveen replied | 10/12/2016

Check the image for answer.

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Bhupender replied | 11/12/2016

Two triangles are congruent if two sides and the included angle of one are equal to the corresponding sides and included angle of the other. Note: This axiom is known as side-angle-side or SAS-Congruence-Axiom or SAS-Criterion because it refers to two sides and the angle between them.

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K

Kavidassan 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Similarity

What are the three conditions by which two triangles are proved similarity?

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P.v.ramana replied | 21/11/2016

SAS SIMILARITY , AAS SIMILARITY AND SSS SIMILARITY.

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N

Naveen replied | 12/12/2016

Actually there are 4 conditions:
1. SSS similarity.
2. ASA similarity.
3. AA similarity.
4. RHS similarity.

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N

Nikhil 13/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Similarity

Is it possible to measure the similarities of any geometrical shapes?

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Jayam replied | 22/11/2016

Yes

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Rajendran replied | 24/11/2016

Yes.

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K

Karunanidhi 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Annuities

If you plan to save Rs. 300 annually for 10 years and the discount rate is 15%, what is the future value?

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Shambhavi replied | 07/12/2016

Formula to be used is:-
Present Value=Future Value/((1+r)^n), where r is discount rate and n in number of years.
So, Future value= 300 *((1+0.15)^10)+300 *((1+0.15)^9)+300 *((1+0.15)^8)+....+300 *((1+0.15)^1).

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Ankit replied | 09/12/2016

Formula to be used is:-
Present Value=Future Value/((1+r)^n), where r is discount rate and n in number of years.
So, Future value= 300 *((1+0.15)^10)+300 *((1+0.15)^9)+300 *((1+0.15)^8)+....+300 *((1+0.15)^1)

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M

Mohammad 12/11/2016 in  Class IX-X Tuition, Mathematics(Class IX-X Tuition), Annuities

If you want to buy a boat in 6 years that costs Rs. 1,000 and you can save Rs. 150 per year, what interest rate would you need?

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Khushbu replied | 01/12/2016

15%

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Ankit replied | 09/12/2016

15%

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