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### 9 Cards in this Set

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• Back
 Area The total number of square units that fill a given shape. Circumference The distance around the edge of a cicle; the "perimeter" of a circle. Diameter A line segment from 1 point on the edge of the circle to another point on the edge, passing through the center of the circle. The longest line segment that cuts across the circle from 1 point 2 another. Perimeter The distance around the edge of a shape; in general, the sum of the lengths of its sides. Pi The ratio of the circumference of a circle to its diameter. π is roughly equal to 3.14. Polygon A closed shape made up of several straight line segments. Radius A line segment from the center of the circle to a point on the edge of the circle. Half of a diameter. Rectangle A 4 sided polygon in which opposite sides have the same length and all angles have the same measure.(90 degrees) Square A 4 sided polygon in which all sides are equal.(90 degrees)