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7-15.

A square. and a right triangle, share a common side, the square's top side, the triangle's horizontal side, and are aligned on the left. Sides are labeled as follows, starting with the diagonal, right side, of the triangle, and going clockwise: 5 feet, 4 feet, 4 feet, unknown, and 3 feet. Find the new dimensions of the figure given at right when it is enlarged by a scale factor of . Then find the perimeter and area of the original and enlarged figures.  

Multiply each dimension by .

The sum of the new dimensions will give you the new perimeter.

Find the area of the triangle and the square using the new dimensions.

Side lengths of new dimensions are now ft, ft, and ft.