Introduction to Radians Quiz

What is a radian primarily defined by?

• The angle that makes an arc equal to the diameter

• The angle that makes an arc equal to the area

• The angle that makes an arc equal to the radius

• The angle that makes an arc equal to the circumference

How many radians are there in a full circle?

• 180 radians

• 360 radians

• 2π radians

• π radians

What is the circumference of a circle in terms of its radius?

• r²

• 2πr

• πr

• πr²

If 2π radians equal 360°, how many degrees is π radians?

• 180°

• 90°

• 360°

• 270°

What is the value of 1 radian in degrees?

• 180°

• 57.3°

• 360°

• 90°