To explain: The reason of determining an angle’s direction of rotation according by its sign.
If the sign of an angle’s measure is positive, the direction of rotation is anticlockwise and if the sign of the angle’s measure is negative, the direction of rotation is clockwise.
Given information: Consider sign of an angle’s measure.
Explanation:
An angle is formed in a coordinate plane by two rays- initial side and terminal side. If angle is at its standard position, it is said to be measured with its origin at the vertex and its initial side on the positive
If the terminal side is rotated anticlockwise, the angle made by the two sides is positive.
If the terminal side is rotated clockwise, the angle made by the two sides is negative.
Chapter 9 Solutions
Holt Mcdougal Larson Algebra 2: Student Edition 2012
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