Question

16) Find the perimeter of each of the following shapes:
a) A triangle of sides 3 cm, 4 cm and 5cm.
b) An equilateral triangle of side 9cm.
c) An isosceles triangle with equal sides 8 cm each and third side 6 cm.​

Answer 1

Answer:

a) 3 + 4 + 5 = 12 cm

b) 9 + 9 + 9 = 27 cm

c) 8 + 8 + 6 = 22 cm

Answer 2

Answer:

1. perimeter of triangle = sum of all sides

= 3+4+5 = 12 cm

2. perimeter of equilateral triangle = side × 3

= 3 × 9 = 27 cm

3. perimeter of isosceles triangle = 8+8+6 = 22cm