ANGLE RELATIONSHIPS Mrs. Insalaca 8 th Grade Math.

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Presentation transcript:

ANGLE RELATIONSHIPS Mrs. Insalaca 8 th Grade Math

ANGLE A figure formed by two rays with a common endpoint

VERTEX The point where two rays meet to form an angle

RIGHT ANGLE An angle with measure equal to 90°

ACUTE ANGLE An angle with measure greater than 0° and less than 90°

OBTUSE ANGLE An angle with measure greater than 90° and less than 180°

STRAIGHT ANGLE An angle with measurement equal to exactly 180°

COMPLEMENTARY ANGLES Two angles whose measures add up to 90°

SUPPLEMENTARY ANGLES Two angles whose measures add up to 180°

ADJACENT ANGLES Two angles that share a vertex and one side, but no common interior points

CONGRUENT ANGLES Angles that have the exact same measure

VERTICAL ANGLES Nonadjacent angles formed by 2 intersecting lines Vertical angles are congruent!!

NAMING ANGLES Angles are named using 3 points. The point at the vertex is always in the middle of the name. C H A

CLASSIFYING ANGLES A C D BE Two Acute Angles: Two Obtuse Angles: A pair of complementary angles: Two pairs of supplementary angles. 30°60° 90°

FINDING ANGLE MEASURES

FACTOR

EVALUATE

HOMEWORK Page 20 #22-31 Page 28 #18-26