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| from the L meaniong to agree, two angles are said to be congruent if and only if they are exactly the same size and shape. this relationship is symbolized by an is equal to sign with a wavy line on top |
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| two angles are said to be equal if adn only if they have the same meausre |
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| congruence/measurement connection |
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| inutitively it seems reasonable that two abgles which are congruent will have equal measures. formally in our geometry, two angles are congruent if adn only if the two angles have equal measure |
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| from two L words meaning to cut in two a bisector of an angle is a geometric figure which cuts teh angle into two congruent parts. formally in our geometry a ray is a bisector of an angle if and only if it is between the sides of the agnle and divides the angle into two congruent angles |
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| from a L word meaning to lie near adjacent angles are angles which lie near each other. formally in our geometry two angles are adjacent if adn only if the two angles have a common vertex and a common ray and the ray lies between the two otehr ssides of the two angles. |
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| from a L word meaning to complete complementary angles are angles which together complete a right angle. formally in our goemetry two angles are complementary fi and only if the sum of their measures is 90 degrees. they are called the complements of each other |
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| from another L word meaning to complete supplementary angles are angles which together complete a straight angle formally in our geometry two angles are supplementary if and only if the sum of their measures is 180 degrees. they are called the supplement of each other |
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| two angles are a linear pair if and only if they have a common side and their exterior sides are opposite rays |
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| from teh same latin word from which we get our word vertex vertical angles share the same vertex. more specifically in our geometry two angles are vertical angles ifa dn only if their sides from two pairs fo poopsite rays |
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