Question

A triangle ABC is enlarged, about the point O as centre of enlargement, and the scale factor is 3. Find : BC, if B' C' = 15 cm. 

Answer 1

Given that ABC is enlarged and the scale factor m = 3 to the triangle A'B'C'.

B'C' = 15 cm

So, BC(3) = B'C'

`=>` BC(3) = 15

`=>` BC = 5 cm