Rotational and Reference Angles

What is the definition of a reference angle?

• The angle formed by the terminal side of an angle and the y-axis

• The angle formed by the terminal side of an angle and the z-axis

• The angle formed by the terminal side of an angle and the origin

• The acute angle between the terminal side of an angle and the x-axis in standard position.

Tags

CCSS.8.G.A.5

Find the reference angle for a rotational angle of 225 degrees.

• 360 degrees

• 180 degrees

• 45 degrees

• 90 degrees

What are rotational angles in standard position?

• Measurements of angles in standard position

• Names of planets

• Colors of the rainbow

• Types of fruits

Tags

CCSS.5.G.A.1

Find the reference angle for the angle -120 degrees.

• -150 degrees

• 90 degrees

• 60 degrees

• -30 degrees

What is the reference angle for a rotational angle of 315 degrees?

• 45 degrees

• 90 degrees

• 180 degrees

• 360 degrees

How to find the reference angle for an angle greater than 360 degrees?

• Subtract 360 degrees from the angle until the result is less than 360 degrees, then find the reference angle as usual.

• Add 360 degrees to the angle

• Divide the angle by 360 degrees

• Multiply the angle by 360 degrees

What is the reference angle for a rotational angle of 270 degrees?

• 90 degrees

• 180 degrees

• 45 degrees

• 360 degrees

What is the reference angle for a rotational angle of 30 degrees?

• 30 degrees

• 60 degrees

• 90 degrees

• 120 degrees

What is the reference angle for a rotational angle of 150 degrees?

• 30 degrees

• 150 degrees

• 180 degrees

• 90 degrees

What is the reference angle for a rotational angle of 200 degrees?

• 160 degrees

• 200 degrees

• 20 degrees

• 180 degrees