Question

Mensuration. Find the area of aequilateral triangle whose perimeter is 180cm

Answer 1

In an equilateral triangle:

All sides are equal

∴ Perimeter = 3a

a = 180/3

a = 60cm

Area = √3/4 * a²

= √3/4*60*60

= 1557cm²

Answer 2

Hey mate

$property = all \: sides \: are \: equal \\ \\ perimeter = 3 a \\a = \frac{180}{3} \\ a = 60 \\ area \: = \sqrt{3}by4 \times {a}^{2} \\ \ \sqrt{3} by4 \times 60 \times 60 \\ = 1557$

Hope it helps uh