9.1exmplanswers

=9.1 Example answers=

Example 1
Measure of angle S is 48°, the radius is 6. What is the arc length? L=M/360°(2πr) L=(48°/360°)(2π6) L=(.1333)(12π) L=5.03

Example 2
Length is 40, radius is 10. What is the angle measure? L=M/360°(2πr) 40=M/360°(2π10) 40=M/360°(20π) (40×360)=M/360°(20π)×360 14400=M(20π) 14400=20πM 14400/20π=M M=229.18°