Question

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

Answer 1

Answer:

a) perimeter of a triangle = a + b + c

= 3 + 4 + 5

= 12 cm

b) perimeter of an equilateral triangle

= 9 + 9 + 9

= 36 cm

c) perimeter of an isosceles triangle

= 8+ 8 + 6

= 22 cm

Answer 2

: Required Answer

(a) Perimeter of triangle = 3 + 4 + 5

= 12 cm

(b) Perimeter of an equilateral triangle = 3 × side

= 3 × 9

= 27 cm

(c) Perimeter of isosceles triangle = 8 + 8 + 6

= 22 cm