Mathematics for IGCSE & O level - Similarity (Section 1 - No. 2)
In two similar triangles, one has a base of 10 cm and a height of 5 cm. If the corresponding base of the other triangle is 15 cm, what is its height?
7.5 cm
10 cm
12.5 cm
20 cm
Giải thích
The scale factor is 15/10 = 1.5. The height is 5 * 1.5 = 7.5 cm.