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Geometry 1-4 Day 2

Geometry 1-4 Day 2. 1.4 Pairs of Angles. Learning Targets. Students will be able to… Identify adjacent, vertical, complementary, and supplementary angles. Find measures of pairs of angles. Warm-up. 1. What is the difference between collinear and coplanar ?

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Geometry 1-4 Day 2

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  1. Geometry 1-4 Day 2 1.4 Pairs of Angles

  2. Learning Targets • Students will be able to… • Identify adjacent, vertical, complementary, and supplementary angles. • Find measures of pairs of angles.

  3. Warm-up 1. What is the difference between collinear and coplanar? 2. What is the difference between a line and a line segment?

  4. Present Wanted Posters

  5. Vocabulary 1 2

  6. Vocabulary 1 2 4 3

  7. 1-4 Vocabulary Review • Adjacent angles- two angles in the same plane with a common vertex and a common side, but no common interior points • Linear pair- a pair of adjacent angles whose noncommon sides are opposite rays • Complementary angles- two angles whose measures have a sum of 90˚ • Supplementary angles- two angles whose measures have a sum of 180˚ • Vertical angles- the non adjacent angles formed by two intersecting lines

  8. Adjacent Angles Examples Non Examples

  9. Adjacent Angles Practice • List all of the pairs of adjacent angles in the figure.

  10. Linear Pairs Example Non Example • Must add to 180° • Do not add to 180° 4 3 1 2

  11. Review of Complementary and Supplementary 1. What is the complement and supplement of ?

  12. Review of Complementary and Supplementary 2. What is the complement and supplement of ?

  13. Adjacent Angles and Linear Pairs Draw the following picture on your guided notes.

  14. Adjacent Angles and Linear Pairs 1. 2. 3.

  15. Adjacent Angles and Linear Pairs Draw the following picture on your guided notes.

  16. Adjacent Angles and Linear Pairs 1. 2. 3.

  17. Vertical Angle Review • Draw two intersecting lines and label the angles. • Which angles are congruent?

  18. Wrap-up • Without going back in your notes… • Who can draw a picture of… • Adjacent angles • Linear Pair

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