Understanding Angles and Angle Measures

What is the position of an angle called when its vertex is at the origin and one ray is on the positive x-axis?

• Standard position

• Terminal position

• Initial position

• Reference position

How do you find a positive co-terminal angle for a given angle?

• Add 180°

• Subtract 180°

• Subtract 360°

• Add 360°

What is the reference angle for a 320° angle?

• 80°

• 60°

• 90°

• 40°

If you rotate an angle clockwise, what type of angle is it considered?

• Obtuse angle

• Positive angle

• Negative angle

• Acute angle

What is the reference angle for a -110° angle?

• 70°

• 80°

• 100°

• 90°

How many radians are there in a full circle?

• 4π radians

• 2π radians

• 3π radians

• π radians

What is the radian measure of 180°?

• 3π radians

• 2π radians

• π radians

• π/2 radians

How do you convert 30° to radians?

• π/6 radians

• π/4 radians

• π/3 radians

• π/2 radians

What is the formula for arc length when the central angle is in radians?

• s = r - θ

• s = r / θ

• s = r + θ

• s = r * θ

If a steering wheel with a radius of 11 inches makes 4/5 of a rotation, what is the arc length traveled?

• 44π/5 inches

• 99π/5 inches

• 55.29 inches

• 88π/5 inches