Question

The ratio of the sides of a triangle are:

3 : 4 : 6

The longest side has a length of 30 cm.

What is the length of the shortest side?

Answer 1

15 cm

Explanation:

The 6 part of the ratio relates to 30 cm

Dividing by 6 gives the value of one part of the ratio

30 cm ÷ 6 = 5 cm ← value of 1 part of the ratio, thus

3 parts = 3 × 5 cm = 15 cm ← shortest side

Answer 2

15 because it’s half of the 30 cm and 3(shortest side) is half of 6(longest)