Unit 4A – Geometric Figures Complementary and Supplementary Angles

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Presentation transcript:

Unit 4A – Geometric Figures Complementary and Supplementary Angles Unit 4 Geometry Unit 4A – Geometric Figures Lesson 2 Complementary and Supplementary Angles

Lesson 2: Complementary and Supplementary Angles Objective: Swabt identify complementary and supplementary angles. Do Now: Quick Check

Lesson 2: Complementary and Supplementary Angles Definitions Complementary Angles are two angles whose sum is 90°. Supplementary Angles are two angles whose sum is 180°.

Lesson 2: Complementary and Supplementary Angles Identify as complementary or supplementary. A b. 1 2 1 2 B C R S T

Lesson 2: Complementary and Supplementary Angles Find the value of x. 2x 28 Since the angles are complementary then 2x + 28 = 90 Solve for x: What is the measure of each angle?

Lesson 2: Complementary and Supplementary Angles Find the value of x. 123° 3x Since the adjacent angles form a straight line then 3x + 123 = 180 Solve for x: What is the measure of each angle?

Classwork Guided Practice #1 – 4 Independent Practice #1 – 10 Problem Solving Practice #1 - 6

Closure Question: How many degrees are complementary and supplementary angles? Exit Ticket Homework: Practice #1 - 13

Exit Ticket Angle 1 and Angle 2 are complementary. If Angle 1 is 48° and Angle 2 is 3x, find the value of x.

Homework