Question

2 shapes A and B, are similar.

length of edges in A : length of edges in B = 2.5
The perimeter of A is 210mm
work out the perimeter of B

Answer 1

525 mm

Explanation:

The edges of A : B = 2.5, thus

The perimeters of A : B = 2.5

Thus the perimeter of B is 2.5 times the perimeter of A

perimeter of B = 2.5 × 210 mm = 525 mm