Unit Circle - Degrees, Radians, Coordinates, OH MY!

Front

What is the radius of the unit circle?

Back

1

Front

What are the exact coordinates of 3π/4 on the unit circle?

Back

(−√2∕2, √2∕2)

Front

How many radians are in a full circle?

Back

2π

Front

What are the coordinates of 210° on the unit circle?

Back

(−√3/2, −1/2)

Front

What is the center of the unit circle?

Back

The center is at the origin (0, 0).

Front

What is the relationship between degrees and radians?

Back

180° is equivalent to π radians.

Front

What are the coordinates of 0° on the unit circle?

Back

(1, 0)

Front

What are the coordinates of 90° on the unit circle?

Back

(0, 1)

Front

What are the coordinates of 180° on the unit circle?

Back

(-1, 0)

Front

What are the coordinates of 270° on the unit circle?

Back

(0, -1)