Question

the height of an equilateral triangle is 10cm.then its area is​

Answer 1

$\color{Green}{\large\underline{\underline\mathtt{Answer:-}}}$ ☞Let each side of the Δ be x cm.

Then, as altitude bisects the base

QS=SR=2x

In ΔPQS,

(2x)2+102=x2

⇒4x2+100=x2

⇒43x2=100

⇒x2=3400

Area of the equilateral Δ=43x2

=43×3400=3100cm2

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Answer 2

Answer:

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