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10-56.

In the figure at right, find the interior height () of the obtuse triangle. Show all work.  

and are the base and height, but so are and . How can you use this fact?

A triangle, with its obtuse angle on the bottom right, sides labeled as follows: bottom, 9 inches,  left, 20 inches. A dashed line segment, from bottom right vertex, perpendicular to the left side, labeled, h. A dashed line segment extends the bottom side to the right. A dashed line segment from the top right vertex, perpendicular to the extended dashed side, is labeled, 12 inches.