Question

Two triangles are similar. The lengths of the sides of the smaller triangle are 3,5 and 6, and the length of the longest side of the larger triangle is 15.

What is the perimeter of the larger triangle?

Answer 1

35 units

Explanation:

15/6=2.5

The larger triangle is magnified by a factor of 2.5

Hence its dimensions are 3×2.5=7.5, 5×2.5=12.5 and 6×2.5=15

Perimeter is 7.5+12.5+15=35 units.