Question

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.

Answer 1

$$(i)$$ Perimeter of the triangle with sides $$3 cm, 4 cm$$ and $$6 cm$$
$$= 3 cm + 4 cm + 6 cm$$
$$= 13 cm$$
$$(ii)$$ Perimeter of the triangle with sides $$7 cm, 5.4 cm, 10.2 cm$$
$$= 7 cm + 5.4 cm + 10.2 cm$$
$$= 22.6 cm$$
$$(iii)$$ Perimeter of an equilateral triangle
$$= 3$$ $$\times$$ length of a side
$$= 3 \times 11 cm$$
$$=33cm$$
$$(iv)$$ Perimeter of isosceles triangle
$$= 10 cm + 10 cm + 7 cm$$
$$= 27 cm$$