4.1d Develop benchmark angles – 45°, 60°, 120° – using 90° angles

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d. Recognize that angles are measured in degrees and develop benchmark angles (e.g., 45°, 60°, 120°) using 90° angles to estimate angle measurement.

4.1d Develop benchmark angles – 45°, 60°, 120° – using 90° angles

July 11, 2011

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d. Recognize that angles are measured in degrees and develop benchmark angles (e.g., 45°, 60°, 120°) using 90° angles to estimate angle measurement.