Question

Q28. If the area of an equilateral triangle is 16V3cm?, then the perimeter of 2 points
the triangle is
O a
a) 48cm
O
b) 24cm
O
C) 12cm
O d) 36cm
29 Two sides of a triangle are 13cm & 14cm. Its semi-perimeter is 20cm. 2 points​

Answer 1

Answer:

(b) Given, area of an equilateral triangle = 16√3 cm2

Area of an equilateral triangle = √3/4 (side)2

√3/4(Side)2 = 16√3 ⇒  (Side)2 = 64

⇒ Side =8 cm

[taking positive square root because side is always positive]

Perimeter of an equilateral triangle = 3 x Side= 3 x 8 = 24 cm

Hence, the perimeter of an equilateral triangle is 24 cm.