Suppose triangle ABC ~ triangle GHI with scale factor 3:5, and AB=9, BC=18 and AC=21. What is the perimeter of triangle GHI?

1 Answer
Dec 15, 2015

××80

Explanation:

×|AB||GH|=35
9|GH|=35
|GH|=15

×|BC||HI|=35
18|HI|=35
|HI|=30

×|AC||GI|=35
21|GI|=35
|GI|=35

Therefore perimeter is:
×|GH|+|HI|+|GI|=15+30+35
×××××××x=80