Question

please tell me how to do this.its very important
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Answer 1

Step-by-step explanation:

For an equilateral triangle,Sides are AB=BC=AC=x

Area of any triangle = 1/2 * X *

∆ABD में , AD² = AB² - BD²

AD = √x² - (x/2)² = √x² - x²/4 = √3x²/4

AD = (√3x/2)

area of an equilateral triangle = 1/2 * (x) * (√3x/2)

= √3x²/4

or (√3/4)x²