Understand radian measure of an angle as the length of the arc on the unit circle subtended by the angle.

Sample Practice Questions (3)

Which of the following is the radian measure for an angle of

13 5^{\circ}

on the unit circle?

\frac{π}{4}

\frac{2 π}{3}

\frac{3 π}{4}

\frac{5 π}{6}

Which statement best describes the definition of one radian?

AIt is the angle subtended at the center of a circle by an arc that is equal in length to the diameter of the circle.

BIt is the angle subtended at the center of a circle by an arc that is equal in length to the radius of the circle.

CIt is the angle formed by two radii of a circle that are perpendicular to each other.

DIt is the angle equivalent to

18 0^{\circ}

divided by

π

Which of the following angles is coterminal with

\frac{7 π}{3}

radians?

\frac{π}{3}

radians

\frac{4 π}{3}

radians

\frac{10 π}{3}

radians

- \frac{π}{3}

radians

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