Question

#Sam want to enlarge a triangle with side lengths 3, 6, and 9 inches. If the shortest side of the new triangle is 12 inches, what is the perimeter of the new triangle?​

Answer 1

Answer: 72 in

Explanation:

The shortest side length of the original triangle was 3in, and the newer one is now 12in. From 3in to 12in, you use a scale factor of 4. Hence, we multiply each side length of the original triangle by 4. And to find the perimeter of the new triangle, you add all the sides up.

3(4) + 6(4) + 9(4) = 72 in