Question

find the area of an equal and triangle each of whose side is 10 cm

Answer 1

I am assuming that your question is about equilateral triangle.

Area of an equilateral triangle = √3/4×a² where a = side of the triangle.

a= 10 is given

area of the triangle = √3/4 x 10²

√3/4 x 100 = √3 x 25 = 43.30