The sides of a triangle are in the ratio 2:4:5 the length of the longest side is 15cm waht is the perimeter of the triangle

Answer 1

Use a proportion to find the medium length side.

4/5=x/15

5x=60

x=12

Since the smallest side is half the medium side, and the medium side is 12, the shortest side is 6.

Perimeter is 15+12+6=33