Question

what is the equivalent of a 180° angle, or a half-turn, in radians?

Options

• \[\frac {π}{2}\] rad

• π rad

• 1 rad

• 2π rad

Answer 1

π rad

Explanation:

This correctly identifies the relationship that a full circle (2π rad) is 360^o, making a half-circle (180^o) equal to π rad.