Question 713617
5+7+8=20 is the perimeter of the first triangle.
15/20=3/4 thus the ratio is 3/4 for the similiar triangle.
(3/4)5=15/4=3.75 for the smaller side.
(3/4)7=21/4=5.25 for the next side.
(3/4)8=24/4=6 for the longest side.
Proof:
3.75+5.25+6=15
15=15