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Warm Up

Week 2. Warm Up. 08.22.11. 1) 3x + 11 = 38. 2). 3( 5x – 8 ) = 21. P 3. Protractor Postulate. The measure of ∠ABC is the absolute value of the difference between the numbers of BA and BC. A. •. Ex 1. C. •. B. Acute Angle. measuring less than 90º but more than 0º. Ex 2.

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Warm Up

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  1. Week 2 Warm Up 08.22.11 1) 3x + 11 = 38 2) 3( 5x – 8 ) = 21

  2. P 3 Protractor Postulate The measure of ∠ABC is the absolute value of the difference between the numbers of BA and BC. A • Ex 1 C • B

  3. Acute Angle measuring less than 90º but more than 0º Ex 2

  4. Right Angle angle measuring 90º Ex 3

  5. Obtuse Angle angle measuring more than 90º but less than 180º Ex 4

  6. Straight Angle angle measuring 180º Ex 5

  7. Angle Names Named for their angle or sides or SQP P • Ex 6 • • R S Q or RQS PQS or RQP SQR Q PQR

  8. Name the Vertex and Sides: Ex 7 H • G • Vertex: F F Side: FH Side: FG

  9. A m The measure of angle A : no stated points on the rays Ex 8 A m∠ A= 50º

  10. m ∠ BAC Points on the rays are stated. Ex 9 50º 50º Angles are Congruent Measures are Equal m∠BAC = m∠EDF ∠BAC ≅ ∠EDF 50º = 50º

  11. Do 1: C • 115º D A B • 65º • 65º 115º • E Is ∠ BAC ≅ ∠ EAD?

  12. Interior Point between each side of an angle ( A ) B • Ex 10 A • Exterior Point outside or not on the angle ( B )

  13. Adjacent Angles Share a vertex and one side, but no common points • R • Q • P S Ex 11 • T ∠QSR adjacent to ∠RSP ∠QSR is not adjacent to ∠PST

  14. Review What is the difference between a straight angle and a supplementary angle? Do 3: What can be the 3 names of this angle? H • G • F Textbook page 29, 1 – 25 all Assignment

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