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8
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Two or more angles that when added together make a 90 degree angle
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9
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Two angles that must add up to be 180 degrees
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10
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A two column table where on the left there is a statement and on the right the reason
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11
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An example that opposes a theorem
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12
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Two angles that share a line but are on opposite sides of it and are in between 2 other separate lines
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13
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Two or more angles that when added together make a 180 degree angle
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15
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Two angles that share a line and are on the same side of that line but on the outside of two separate lines
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16
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Angles on the opposite sides of two intersecting lines that have the same degree
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18
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A line that cuts something else into separate parts
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19
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Intersecting a system of lines
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