An angle on the coordinate plane is in standard position if the vertex is at the origin and one ray is on the positive 𝑥-axis. The ray on the 𝑥-axis is called the initial side. The ray that rotates about the center is called the terminal side. If the measure of an angle is ...
Check It Out: Example 1 Continued Use a protractor to measure the angle. G I H Using the scale that starts with 0° along ray HI, read the measure where ray HG crosses. Check It Out: Example 1 Continued Use a protractor to measure the angle. G I H The measure of GHI is 70°. ...
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