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5-99.

The angle at right measures $90°$. Estimate the measure (in degrees) of each angle below. Note: The angles are drawn to scale.

1. If the angle in part (a) measures $65°$, what would be the measure of its supplementary angle? Justify your answer.

Supplementary angles are angles that sum to make a $180°$ angle.

Use the slider in the eTool below to estimate the degree measurements for parts (a) - (d).
Click the link at right for the full version of the eTool: MC2 5-99 HW eTool