Drawing Angles

He said that the steering angle of AB is 0 degrees, and British Columbia is 45 degrees. How can I get it?

An angle of deviation, by definition, is the angle between the current and previous line. So is the steering angle of AB is 0 degrees and you have no other information about this, AB is the same line as the existing line. Without an existing line, you can not have a steering angle.

0 ° is a straight line. 45 degrees is half a right angle. Use a protractor.

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