Section 4.1 handout ann_1

Section 4.1 handout ann_1 - Section 4.1 Angles and Their...

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Unformatted text preview: Section 4.1 Angles and Their Measure, p. 1 Section 4.1: Angles and Their Measure 1) Recognize and use the vocabulary of angles . Ray, angle, initial side, terminal side, vertex, standard position, positive angles, negative angles, quadrant, quadrantal angle. 2) Use degree measure . a. One degree, 1 ° , is 1/360 of a complete rotation around a circle. b. Types of angles: acute: ° < θ < 90 ° right: θ = 90 ° obtuse: 90 ° < θ < 180 ° straight: θ = 180 ° Section 4.1 Angles and Their Measure, p. 1 Section 4.1 Angles and Their Measure, p. 2 3) Draw angles in standard form . a. An angle is in standard form when the vertex of the angle is placed at the origin, the initial side is placed along the positive x-axis and the terminal side is found by rotating θ degrees counterclockwise for a positive angle and clockwise for a negative angle. b. Example 1 : Draw each angle in standard position: 1. 45 °, 2. 225 ° 3. -135 °, 4. 405 ° 4) Find coterminal angles ....
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Section 4.1 handout ann_1 - Section 4.1 Angles and Their...

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