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1
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a chord that passes through the center of a circle
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2
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a square that is an L-shaped tool used to draw right angles
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3
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type of angle that is formed by two chords
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4
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type of arc that is half of a circle
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6
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a segment whose endpoints are the center of a circle and a point on the circle
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7
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the opposite direction of the hands of a clock
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8
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a line in the plane of a circle that intersects the circle in exactly one point
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11
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polygon with exactly three sides
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13
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a line that intersects a circle in two points
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15
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type of arc that is greater than 180 degrees
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16
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circles that have the same radius are said to be this
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17
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type of angle that is equal to its intercepted arc
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18
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segment whose endpoints are points on a circle
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20
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a transformation in which a figure is turned about a fixed point
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