IA2.GR.C: Make sense of circles and their properties.

Make sense of circles and their properties.

IA2.GR.C.8Apply similarity to develop and use formulas involving arc length, radian measure, and sector area. a. Explain and demonstrate, using similarity, that arc length is proportional to the radius of a circle. b. Calculate the radian measure of a central angle as the ratio of arc length to radius. c. Apply the formula for the area of a sector using radian measure.IA2.GR.C.9Create the equation of a circle given the center and radius; identify the center and radius of a circle given the equation.

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