8.3 - Radian Measure Quiz

1 rad = .................... degrees

• 1

• 180

• 360

• 57.3 (1 d.p.)

Answer explanation

Note in the diagram that for a fixed radius of 5 units,

as the angle increases, the arc length increases as well.

This shows that the arc length is directly proportional to the angle (for a fixed radius).

Answer explanation

The value of sin 30 is ...

• 0.5

• -0.5

• -0.988

• 0.988

Answer explanation

There is no degree symbol on the angle. Hence, it is measured in radian in this case.

What is a question that you have about radians?