Posted by **Ashley** on Thursday, May 23, 2013 at 10:28pm.

A maple tree casts a shadow of 45 ft long. At the same time, a 40-ft-long oak tree casts a shadow which is 60 ft long. Explain how you can use similar triangles to find the height of the tree. Then find the height of the tree.

- Math -
**Steve**, Friday, May 24, 2013 at 11:29am
Draw similar right triangles, one with sides of 40 and 60, and the other with sides of h and 45

Since the triangles are similar, the ratio of corresponding sides is constant.

h/40 = 45/60

h = 30

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