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6
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two angles that add up to 90 degrees
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7
|
two angle that are adjacent and supplementary
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8
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a common way to organize proof in geometry that has two columns one for statement, one for reason
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9
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an example that disproves a statement
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10
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two angles that are on opposite sides of the transversal, on different lines and inside the two lines
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11
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two angles that add up to 180 degrees
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13
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two angles that are on the same side of the transversal, on different lines and outside the two lines
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14
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angle opposite to each other when two lines cross
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17
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points that lie on the same line
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18
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a lines that cut through two or more lines
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