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Unformatted text preview: 17-4 Radian Measure For Angles and Arcs
A) Radians (another form of measuring angles)
a. b. c. Central angle i. Is an angle with a vertex at the center of a circle Intercepted arc i. Is the portion of the circle with endpoints on the sides of the central angle and remaining points within the interior of the angle Radian i. when a central angle intercepts an arc that has the same length as a radius of the circle a. Because the circumference of a circle is, there are radians in any circle. b. Since radians = we can convert between the two easily i. To convert degrees to radians, multiply by ii. To convert radians to degrees, multiply by B) Examples a. Convert to radians 60. 2)120 220. b. convert to degrees 4)330 1) 2) 3) ...
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- Spring '09