If the radius of the circle in the figure is 20 cm and length equals 85 cm, what is the radian measure of angle?

If the radius of the circle in the figure is 20 cm and length equals 85 cm, what is the radian measure of angle?

Choices are ; 3 pie over 9 -25 pie over 7 -3 pie over 7 25 pie over 7

Choices are ; 14 pie over 9 5 pie over 18 2 pie over 7 7 pie over 14

Choices are; Right angle Straight angle Acute angle Obtuse angle

Choices are ; 21 pie over 22 3 pie over 11 5 pie over 11 11 pie over 22

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