Co-Terminal and Reference Angle

Multiple Choice

Positive angles are measured in which direction from standard position?

• Clockwise
• Counterclockwise

Multiple Choice

Negative angles are measured in which direction from standard position?

• Clockwise
• Counterclockwise

Multiple Choice

Standard position is when .....

• the initial side of the angle is on the positive x-axis.
• the initial side of the angle is on the negative x-axis.
• the initial side of the angle is on the positive y-axis.
• the initial side of the angle is on the negative y-axis.

Multiple Choice

Which of the following degree measures is represented by this diagram?

• $$135\degree$$

• $$85\degree$$

• $$210\degree$$

• $$-220\degree$$

Multiple Choice

Which of the following shows $$-210\degree$$  graphed in standard position?

Multiple Choice

Which of the following shows $$480\degree$$  graphed in standard position?

Multiple Choice

Which of the following degree measures is represented by this diagram?

• $$-\frac{3\pi}{4}$$

• $$\frac{6\pi}{5}$$

• $$-\frac{\pi}{3}$$

• $$-\frac{7\pi}{4}$$

Multiple Select

Which of the following is/are TRUE about refernce angle?

NOTE: You may choose more than one answer.

• It is positive

• It is an obtuse angle

• One of its side is the terminal side of the given angle

• The other side of the angle is an x-axis

Fill in the Blanks

What is the reference angle of $-245\degree?$  

Multiple Choice

The terminal side of a -45° angle is in what Quadrant?

• Quadrant I

• Quadrant II

• Quadrant III

• Quadrant IV

Multiple Choice

Which of the following angles are co-terminal to 450^o?

• 450^o, -450^o

• 90^o, -270^o

• 270^o, -90^o

• 420^o, -330^o

Multiple Choice

What is the reference angle?

• 43

• -43

• 47

• -47

Multiple Choice

What is the reference angle?

• 163

• 73

• 27

• 107

Multiple Choice

What are the negative and positive coterminal angles of 120°?

• 420°, -240°

• 480°, -240°

• 300°, -360°

• 0°, -250°