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STANDARD G.C.B.5

Derive using similarity the fact that the length of the arc intercepted by an angle is proportional to the radius, and define the radian measure of the angle as the constant of proportionality; derive the formula for the area of a sector.  Radian introduced only as unit of measure.

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arc length
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7/1 TST
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DOC
TNS

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13

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Practice-Sectors

9

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VIDEOS Finding the length of an arc VID
Finding the area of a sector of a circle VID
Finding the area of a segment of a circle
 
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