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1.6 Angles and Their Measures. Pg 35. Angles (in your booklet). Made of two rays that share an endpoint The common endpoint is the vertex of the angle The rays are the sides of the angle When naming an angle, the vertex is always the middle letter (unless it is the only letter)
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Angles (in your booklet) • Made of two rays that share an endpoint • The common endpoint is the vertex of the angle • The rays are the sides of the angle • When naming an angle, the vertex is always the middle letter (unless it is the only letter) • A point from each of the two sides are the first and last letters • Can also be named by a number
Types of Angles (In Your Booklet) • Acute • Obtuse • Right • Straight
Types of Angles • Acute – greater than 0o, less than 90o • Obtuse – greater than 90o, less than 180o • Right – 90o • Straight – 180o
Angle Addition Postulate • If A is in the interior of <XYZ, then m < XYA + m < AYZ = m < XYZ X A Z Y
Homework: • Assignment # 6 • Textbook page 38 problems 1-20, 24-29