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Right angle - measures 90*, supplementary angles - Sum of angles is 180*, ray - has a starting point and no endpoint, acute angle - measures less than 90*, obstuse - measure more than 90*...less than 180*, straight angle - measures 180*, complementary angle - sum of angles is 90*, intersecting lines - lines that cross, parallel lines - lines that will never touch, perpendicular lines - lines that intersect and form a 90* angle, line segment - lines that have a beginning and an end,

geometry for Maddie

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