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 Challenge
 Equivalent Ratios:  Ratios that represent the same fractional number, value, or measure.

Altitude to the Hypotenuse: Find as many as possible proportions that exist in a given situation.

Angle Bisector: Given a triangle and an angle bisector, determine proportions comparing the lengths of the various segments that form the triangle.

Boys and Girls in the Class: Explore the properties of ratios of boys-to-girls in several classrooms.

Let's Play Ball!: Determine the the number of plate appearances of a baseball player.