d.	Recognize that angles are measured in degrees and develop benchmark angles (e.g., 45°, 60°, 120°) using 90° angles to estimate angle measurement. <br /> <br /> <img src="http://emed.nucenter.org:8171/2011-07-11/4.1d+Develop+benchmark+angles+%25E2%2580%2593+45%25C2%25B0%252C+60%25C2%25B0%252C+120%25C2%25B0+%25E2%2580%2593+using+90%25C2%25B0+angles-posterimage.png" alt="http://emed.nucenter.org:8171/2011-07-11/4.1d+Develop+benchmark+angles+%25E2%2580%2593+45%25C2%25B0%252C+60%25C2%25B0%252C+120%25C2%25B0+%25E2%2580%2593+using+90%25C2%25B0+angles.m4v" height="320" class="aligncenter posterimg" width="480" />

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

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

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

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

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