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The figure consists of 4 unit squares. What is the blue shaded area?

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What is the area of the red figure? (All arcs shown are of circles.)

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The large triangles are identical. Which is larger, the pink area on the left or the blue area on the right?

All internal triangles are similar to the larger triangles.

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What is the area of the yellow shaded region? (The overall figure is a right triangle.)

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