Q3 of 99 Page 267

If the height of an equilateral triangle ABC is 5√3 cm. Let us write by calculating the area of this triangle.

Given, in equilateral triangle height (h)= 5 √ 3 cm


Area of equilateral triangle =


And height of equilateral triangle = , where a is side of equilateral triangle


⇒


⇒ 10 = a


Area of equilateral triangle =


=


= √3 × 25cm2


= 25√3 cm2


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