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4-1.  Thinking about angles differently:  Rotating a ray to create an angle  Initial side - where we start  Terminal side - where we stop.

Published byElizabeth Shaw Modified over 9 years ago

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Presentation on theme: "4-1.  Thinking about angles differently:  Rotating a ray to create an angle  Initial side - where we start  Terminal side - where we stop."— Presentation transcript:

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2  Thinking about angles differently:  Rotating a ray to create an angle  Initial side - where we start  Terminal side - where we stop  Thinking about angles differently:  Rotating a ray to create an angle  Initial side - where we start  Terminal side - where we stop

3  Standard Position- the initial side is on the positive side of the x axis with the vertex on the origin  Positive angle – rotate counterclockwise  Negative angle – rotate clockwise  Standard Position- the initial side is on the positive side of the x axis with the vertex on the origin  Positive angle – rotate counterclockwise  Negative angle – rotate clockwise

4  Coterminal angles - angles are coterminal when there terminal ray is in the same position.  Radian measure – Radians are a ratio of arc length to radius. One radian is when the arc length is equal to the radius.  Coterminal angles - angles are coterminal when there terminal ray is in the same position.

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10  Pg 255 #5-16 all  Pg 255 #5-16 all

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