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Glossary - Venema

# Glossary - Venema - Glossary Venema uuu r uuu r Angle An...

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Glossary – Venema Angle: An angle is the union of two nonopposite rays AB uuur and AC uuur sharing the same endpoint. The angle is known as or BAC CAB . The point A is called the vertex and the rays AB uuur and AC uuur are called the sides of the angle. p. 48 EDF is a right angle if μ ( EDF ) = 90º. EDF is an acute angle if μ ( EDF ) < 90º. EDF is an obtuse angle if μ ( EDF ) > 90º. p. 53 Two angles ABC and EDF are supplementary if μ( ABC ) + μ( EDF ) = 180º. p. 58 Between: Let A , B , and C be three distinct points. The point C is between A and B , written A * B*C , if A , B , and C are collinear and AC + CB = AB. p. 37 Ray AD uuur is between rays AB uuur and AC uuur if D is in the interior of BAC . p. 49 Circle: Given a point O and a positive real number r , the circle with center O and radius r is defined to be the set of all points P such that the distance from O to P is r . p. 44 Collinear: Three points A , B , and C are collinear if there exists one line l such that all 3 points all lie on l . The points are noncollinear otherwise.

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