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Across 1. a tool used to measure angles 6. the amount of space inside a figure 7. the distance around a figure 9. plane figures with three or more sides; examples are triangles, quadrilaterals, pentagons, hexagons, and octagons 10. a quadrilateral whose opposite sides are parallel; examples are rectangles and squares

Down 2. the distance from the center of a circle to its edge 3. the distance around a circle 4. a three dimensional figure that has length, width, and height 5. figure formed by two rays with the same endpoint 8. the amount of space inside a three dimensional figure