Welcome to class The warm up is 1-2 Word puzzle on the table.

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Presentation transcript:

Welcome to class The warm up is 1-2 Word puzzle on the table

Let’s grade your homework

1.3 Measuring Angles Please get: ♥one piece of patty paper ♥protractor ♥your notes

With the straight edge, draw these angles on your patty paper (DO NOT FREE HAND): S R P Q Measure each angle. Do you notice anything?

Angle Addition Postulate m  PQS + m  SQR = m  PQR P Q S R Which one makes sense?  A +  B = 85° Or m  A + m  B = 85° A B

Angle Congruence Postulate ♥If two angles have the same measure, then they are congruent. ♥the converse is also true: If two angles are congruent, then they have the same measure.

COMPLEMENTARY Angles – Exactly two angles whose sum is 90°. Each angle is a COMPLEMENT of the other. SUPPLEMENTARY Angles = Exactly two angles whose measure is 180°. Each angle is a SUPPLEMENT of the other. A 60° 120° C 30° B Complementary angles are  A and  B  A and  B are complements of each other  A and  C are supplementary angles  A and  C are supplements of each other Are you doing ok?

Linear Pair Property If two angles form a line, they are a linear pair AND are supplementary. 125° 55°

Angles RIGHT ANGLE = 90° INDICATED BY THE BOX IN THE CORNER ACUTE ANGLE = angle less than 90° OBTUSE ANGLE = angle more than 90° but less than 180° STRAIGHT ANGLE = angle that equals 180° REFLEX ANGLE = angle greater than 180° and less than 360°.

Whiteboards Please get a whiteboard, marker, and eraser. Doodle time starts in one minute.

Your assignment 1.3 Wksht