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1
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It is less than a right angle
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4
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A 4-sided polygon with all sides equal and all right angles
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6
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A part of a line
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7
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A flat, closed figure made up of line segments
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10
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A polygon with 4 sides
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12
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A polygon with all equal sides
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13
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A polygon with 6 sides
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15
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Two lines that cross
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16
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A triangle which has two of its sides equal in length
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18
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A 4-sided polygon with opposite sides equal and all right angles
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19
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A quadrilateral with all four sides equal in length
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20
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It is greater than a right angle
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21
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A polygon with 8 sides
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2
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A quadrilateral which has at least one pair of parallel sides
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3
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A three sided polygon
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5
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A triangle where all three sides are different in length
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7
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Two lines that are always the same distance apart
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8
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A quadrilateral with two pairs of opposite sides parallel
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9
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It goes on and on in one direction
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11
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It continues on and on in both directions
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14
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It is made up of two rays
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17
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A polygon with 5 sides
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