Question

13. The perimeter of an equilateral triangle is 24 cm.
Find its area.​

Answer 1

Perimeter of an equilateral triangle: 3xside

24 = 3 x side

side = 24/3 = 8 cm

Area of an equilateral triangle: \frac{\sqrt[]{3} a^{2} }{4}43a2

= \sqrt{3}3 x 8^{2}82 / 4

= \sqrt{3}3 x 64/4

= \sqrt{3}3 16

or 27.7 (approximately)