Circle Vocab

What is the definition of center?

• around the outside

• Distance from center to outside

• Distance from side to side through center

• middle of a circle

What is the definition of radius?

• around the outside

• Distance from center to outside

• Distance from side to side through center

• middle of a circle

What is the definition of diameter?

• around the outside

• Distance from center to outside

• Distance from side to side through center

• middle of a circle

What is the definition of circumference?

• around the outside

• Distance from center to outside

• Distance from side to side through center

• middle of a circle

What is the equation for circumference? (choose all that apply)

•  $\pi r^2$  

• $2\pi r$

• $d\pi$

• $r\pi d$

What is the equation for area?

•  $\pi r^2$  

• $2\pi r$

• $d\pi$

• $r\pi d$

What is the definition of area?

• around the outside

• Distance from center to outside

• Distance from side to side through center

• amount of space on the inside of the circle.

Define supplementary angles.

• angles that add up to 90

• angles that add up to 180

• angles that share a vertex and side

• angles formed by intersecting lines and are congruent

Define complementary angles.

• angles that add up to 90

• angles that add up to 180

• angles that share a vertex and side

• angles formed by intersecting lines and are congruent

Define adjacent angles.

• angles that add up to 90

• angles that add up to 180

• angles that share a vertex and side

• angles formed by intersecting lines and are congruent