Unit Circle

What is the radius of a unit circle?

• 1
• 2
• 1/2
• 0

Which fraction represents the special decimal .707?

• √2/2

• √3/2

• 1/2

• 1

What the coordinates of 180° on the unit circle?

• 0, 1
• 1, 0
• -1, 0
• 0, -1

Where can you find point (-√2 /2, -√2/2) with respect to the unit circle?

• on

• inside

• outside

• none of the above

Choose the best match for the graph.

• 90^o
• 135^o
• 150^o
• 180^o

The hypotenuse of any right triangle from the center of the unit circle to an edge is always

• 1
• sqt2/2
• sqt3/2
• 1/2

The distance across the circle through the center is called the...

• radius
• diameter
• circumference
• area

The distance from the center of the circle to any point on the circle is called the...

• radius
• diameter
• circumference
• area

The distance all the way around the circle is called the...

• radius
• diameter
• circumference
• area

The space contained inside of a circle is called the...

• radius
• diameter
• circumference
• area