Question

find the area of equilateral triangle having the length of a side equals 10cm

Answer 1

area of equilateral triangle =√3/4*side^2
=√3/4*100=√3*25
=25√3
hope this will help you....

Answer 2

Given :

Length of a side equals 10cm

To Find :

find the area of equilateral triangle

Solution:

Length of side of equilateral triangle = 10 cm

Area of equilateral triangle = $\frac{\sqrt{3}}{4}a^2$

Where a is the side

a=10

So,Area of equilateral triangle =$\frac{\sqrt{3}}{4}(10)^2$

Area of equilateral triangle =$43.30 cm^2$

Hence The area of equilateral triangle is 43.30 sq.cm.