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8133 metersquare

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3(a-b)(b-c)(c-a)

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30 cm2

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No anyone.because sum of triangle is equal to 180.but here sum of angles are 181.

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The sides of triangular plot is in ratio 6:7:8 and perimeter = 420 meter. Then find area? Suppose, sides are 6x, 7x, 8x then perimeter = 6x + 7x + 8x = 21x = 420 meter. As, 21x = 420 meter, So x = 20. Then sides are 6×20 =120 m, 7× 20 =140 meter.8×20 =160 meter. Perimeter ÷...

read more The sides of triangular plot is in ratio 6:7:8 and perimeter = 420 meter. Then find area?

Suppose, sides are 6x, 7x, 8x then perimeter = 6x + 7x + 8x = 21x = 420 meter.

As, 21x = 420 meter,

So x = 20.

Then sides are 6×20 =120 m, 7× 20 =140 meter.8×20 =160 meter.

Perimeter ÷ 2 = 420 ÷ 2 = 210.

Now area of triangle = under root of [210 (210 -120) (210 – 140) (210 – 160) metre ^{2}.

= 8127 metre ^{2}.

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