9.3B Notes: Angle conversions

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Presentation transcript:

9.3B Notes: Angle conversions

Radian measure has to do with circles and their circumference Radian measure has to do with circles and their circumference. They involve π. 360° = full circle = 2π radians 180° = half circle = π radians Radian measure

Conversion factors: Degrees to radians: multiply degree by Radians to degrees: multiply radian measure by Conversion factors:

Let’s try it!!! EX1: 125° EX 2: - EX 3: 135° EX 4: -50° EX 5: EX 6:

So, can we find coterminal angles too? Of course  Let’s fill in the circle with radian measure: Draw the angle, state the quadrant of it’s terminal side, find one positive and one negative coterminal angle measure. EX 8) EX 9) So, can we find coterminal angles too?