SOLUTION: A triangle has sides 3cm, 5cm and 7 cm. The longest side of a similar triangle is 12 cm. Find the length of the shortest side.

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Question 1116573: A triangle has sides 3cm, 5cm and 7 cm. The longest side of a similar triangle is 12 cm. Find the length of the shortest side.
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
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From similarity, you have this proportion


3%2Fx = 7%2F12,


where x is the unknown shortest side of the larger triangle.


From the proportion,  x = %283%2A12%29%2F7  centimeters.