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Examine the diagram at right. The smaller triangle is similar to the larger triangle. Write a proportion and solve for . It will be helpful to draw the two triangles separately on your paper.

Draw two separate triangles. The larger triangle has base .

A right triangle, has horizontal side, 8, and vertical side x. The horizontal side is extended, 10 units, creating, a horizontal base of a larger right triangle. The larger right triangle, has a vertical side of 8.