Question

Find the area of piece of cardboard which is the shape of an equilateral triangle of side 12 cm.​

Answer 1

Step-by-step explanation:

perimeter=36cm

semi perimeter=18cm

area=((18)(18-12)(18-12)(18-12))^1/2

=(2*3*3*2*3*2*3*2*3)^1/2

=2*2*3*3(√3)

=36√3

Answer 2

Answer:

36√3

Step-by-step explanation:

We take the area as A,

A = √3/4 * 12²

=> A = 36√3