Question

Side of an equilateral triangle is 4cm it's area is

Answer 1

Answer:

4√3 cm^2

Step-by-step explanation:

A=4 cm

Perimeter= 4+4+4=12 cm

Semi perimeter=12/2=6 cm

Using herons formula

Area = √s(s-a)(s-b)(s-c)

=√6(6-4)(6-4)(6-4)

=√6*2*2*2

=√2*2*2*2*3

=4√3 cm^2