Mathematics for IGCSE & O level - Similarity (Section 1 - No. 24)
The lengths of the sides of a triangle are in the ratio 2:3:4. If the smallest side of a similar triangle is 6cm, what is the length of the longest side?
9 cm
12 cm
18 cm
24 cm
Explication
Scale factor is 6/2 = 3. Longest side = 4 * 3 = 12 cm.