Practice 4.1 Angles and Radian Measure Convert each angle in degrees to radians. Express answer as a multiple of . 51. 3000 517/3 52. -1200 —37t 55. -135 Convert each angle in radians to degrees. 53. 54. — Find the length of the arc on a circle with the given radius intercept by the given central angle Express arc length in terms of It . In a geometric figure like a triangle all angles have positive measurement. So in a triangle our angles could have measures of $30^o, 60^o, 90^o$ or $\pi/6, \pi/3, \pi/2$ if you like. These are measurements of physical angles which are never negative. However the measurements are done in degrees or radians which is a numerical system and we can ...

Lesson 17.1 Angles of Rotation and Radian Measure. Lesson 17.2 Defining and Evaluating the Basic Trigonometric Functions. Lesson 17.3 Using a Pythagorean Identity. 5. Convert the following degree measures to radian measures without the use of a calculator, and specify which quadrant each angle lies in. (a) 345o (b) 0.54o (c) −48o (d) 200o 6. Find the length of the arc on a circle of radius 20 centimeters intercepted by a central angle of π 4 radian. 7.