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A ladder is 10 ft long and reaches 8 ft up a wall, as shown in the figure. How many feet is the bottom of the ladder from the base of the wall?

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In the figure shown, each pair of intersecting line segments meets at a right angle, and all the lengths given are in inches. WHat is the perimeter, in inches, of the figure?

• 40

• 52

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• 80

THe trapezoid is divided into 2 triangles and 1 rectangle. Lengths are given in inches. What is the combined area, in square inches, of the 2 shaded triangles?

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The ratio of the radii of two circles is 4:9. What is the ratio of their circumferences?

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• 4:9

• 16:81