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Understanding Angles: Definitions and Classifications

Learn to identify angles, bisectors, and angle addition postulates. Practice naming and classifying angles. Homework and quiz included. Engage with interactive resources and storytime videos to strengthen your understanding.

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Understanding Angles: Definitions and Classifications

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  1. 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

  2. “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

  3. Example Name all angles with B as a vertex. 2. Name the sides of <5. 3. Write another name for <6.

  4. Congruent angles • Two angles with the same angle measure (Note: Arcs on the angle signify that they are congruent.) What angles are congruent?

  5. 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

  6. Classifying Angles: D A B C

  7. 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

  8. Example Classify each angle as right, obtuse, acute or straight. 1. <TYV 2. < WYT 3. <TYU 4. <TYX

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