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Warm-Up: on worksheet (1-12) Objective:SWBAT determine various parts of an angle. (1.4)SWBAT apply angle bisectors & angle addition postulate (1.4)**hw/hw log/storybookHomework (day 6):Regular: p. 31 (1-3, 8, 13, 14, 18-23, 29, 30)- ck odd answers in text!! Quiz in two blocks (angle bisectors, midpts)Honors: “Angles and their Bisectors” wksQuiz in two blocks (angle bisectors, midpts)Pearsonsuccess Due Friday Angles (G.4d,e) http://www.kidsinglish.com/newspeak/video_clips/fantastikos-math-wmvs/fant-math.htm
“Story Time”…………Angles • Formed by two non-collinear rays. • A common endpoint. • Symbolically: ___________ • Sides: of an angle are __________ namely ___________________ • Vertex: is the ____________ namely ____________ P A T
Example Name all angles with B as a vertex. 2. Name the sides of <5. 3. Write another name for <6.
Congruent angles • Two angles with the same angle measure (Note: Arcs on the angle signify that they are congruent.) What angles are congruent?
There are three ways to name an angle Trace the angle: The vertex must be the middle letter This angle can be named as _________ only the vertex letter (only when there is only one angle present). Vertex: Angle number Only if the angle has a number A 2 C B Lesson 1-4: Angles
Classifying Angles: D A B C
Example • K is the vertex of how many angles? __________ Can you identify the angle as ? ___________ How angles are there in the diagram? __________ Name each angle. ____________________________________ Lesson 1-4: Angles
Example Classify each angle as right, obtuse, acute or straight. 1. <TYV 2. < WYT 3. <TYU 4. <TYX