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

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Presentation transcript:

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

Geometry 1.4 Day 2 I will use angle postulates A C B Ex 1 P 3 Protractor Postulate The measure of ∠ABC is the absolute value of the difference between the numbers of BA and BC.

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

Right Angle angle measuring 90 º Ex 3

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

Straight Angle angle measuring 180 º Ex 5

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

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

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

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

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

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

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

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