Question

Find the perimeter of 

a) An equilateral triangle whose side is 3.5cm. 

b) A square whose side is 4.8cm.

Answer 1

a) Given side of an equilateral triangle is 3.5 cm. 

We know that, perimeter of an equilateral triangle 

= 3 x length of the side = 3 x 3.5 = 10.5 cm . 

∴ Perimeter = 10.5 cm

b) Given side of a square = 4.8 cm 

We know that, perimeter of a square 

= 4 x length of the side 4 x 4.8 

∴ Perimeter = 19.2 cm