Question

21 cm If the ratio of the sides of a triangle is 3: 4: 5 and its perimeter is 36 cm. find: (ii) its area (i) the measure of its sides​

Answer 1

Explanation:

3:4:5 divides the perimeter into 3+4+5 = 12 parts

36 cm / 12 parts = 3 cm per part

then 3 parts = 9 cm 4 parts = 12 cm 5 parts = 15 cm

3/4/5 is a right triangle area = 1/2 * leg1 * leg2 = 1/2 * 9 * 12 = 54 cm^2