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Angles

Angles. #29 Acute angle ( def ) - angle less than 90° # 28 Right angle ( def ) - angle = 90° #30 Obtuse angle ( def ) - angle greater than 90° #31 Straight angle ( def ) - angle = 180° #26 Interior of angle #27 Exterior of angle.

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Angles

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  1. Angles #29 Acute angle (def)- angle less than 90°# 28 Right angle (def)- angle = 90°#30 Obtuse angle (def)- angle greater than 90°#31 Straight angle (def)- angle = 180° #26 Interior of angle #27 Exterior of angle

  2. To Name an Angle- either use 3 letters or number it, never use only 1 letter. Name with vertex in the middle. A D or never vertex 1 2 B C Congruent angles- angles that have = measures. - measure of an angle

  3. #33 Adjacent Angles (def)-2 coplanar angles that share a common ray #36 Linear Pair (def)-adjacent angles whose non-common sides form a line. (describes) #39 Linear Pair Theorem- If 2 angles form a linear pair, then they are supplementary.(Value)

  4. #35 Vertical Angles(def)- 2 nonadjacent angles formed by intersecting lines (describes) 1 4 2 3 #42 Vertical Angles Theorem- If 2 angles are vertical, then they are congruent. (value)

  5. #37 Complementary angles (def)- 2 angles whose sum is 90° or 50° 40°

  6. #38 Supplementary angles(def) – 2 angles whose sum is 180° or 145° 35°

  7. #34 Angle Bisector(def)- is a ray that divides the angle into 2 congruent angles. A D B C #32 Angle Addition Postulate- sum of the parts = whole

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