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Published byMichael Pitts Modified over 9 years ago
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5.1 Angles and Radian Measure
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ANGLES Ray – only one endpoint Angle – formed by two rays with a common endpoint Vertex – the common endpoint of an angle’s initial and terminal sides. -Vertex @ origin -Initial side lies along positive x-axis
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QUADRANTS When in standard position, an angle’s terminal side lies in a quadrant.
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Quadrantal Angle Not in a quadrant. Terminal side is on either the x- or y-axis.
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MEASURING ANGLES USING DEGREES Acute Right Obtuse Straight
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MEASURING ANGLES IN RADIANS One radian is the measure of the central angle of a circle that intercepts an arc equal in length to the radius of the circle.
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Ex #1: RADIAN MEASURE
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MEASURING ANGLES IN RADIANS One radian is the measure of the central angle of a circle that intercepts an arc equal in length to the radius of the circle.
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Plus just a little bit more !
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Radians and Degrees
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CONVERSION
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Ex #2-3
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Drawing Angles in Standard Position
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UNIT CIRCLE
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FINDING COTERMINAL ANGLES
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HOMEWORK Pg. 480 #1-55 odd + pg. 476 Checkpoint #5 (you’ll need to read Example 5 in order to do the checkpoint)
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