Find the perimeter of each of the following shapes:

(i) A triangle of sides 3 cm, 4 cm and 6 cm.

(ii) A triangle of sides 7 cm, 5.4 cm and 10.2 cm.

(iii) An equilateral triangle of side 11 cm.

(iv) An isosceles triangle with equal sides 10 cm each and third side 7 cm.

(i) Perimeter of triangle = Sum of all sides

= 3 + 4 + 6 cm

= 13 cm

Hence, the perimeter of the triangle is 13 cm.

(ii) Perimeter of triangle = Sum of all sides

= 7 + 5.4 + 10.2 cm

= 22.6 cm

Hence, the perimeter of the triangle is 22.6 cm.

(iii) Perimeter of equilateral triangle = 3 × side

= 3 × 11 cm

= 33 cm

Hence, the perimeter of the equilateral triangle is 33 cm.

(iv) Perimeter of isosceles triangle = Sum of all sides

= 10 + 10 + 7 cm

= 27 cm

Hence, the perimeter of the isosceles triangle is 27 cm.