Circles

What is the formula for circumference?

•  $\pi\cdot d$  

•  $\pi\cdot r\cdot r$  

•  $2r$  

•  $\frac{c}{\pi}$  

What is the formula for area?

•  $\pi\cdot d$  

•  $\pi\cdot r\cdot r$  

•  $2r$  

•  $\frac{c}{\pi}$  

What is the formula for diameter?

•  $\pi\cdot d$  

•  $\pi\cdot r\cdot r$  

•  $2\pi r$  

•  $\frac{c}{\pi}$  

Which formula's will give you circumference? (pick 2)

•  $2\pi r$  

•  $\pi\cdot r\cdot r$  

•  $\pi\cdot d$  

• 2r

Which formula's will give you diameter? (pick 2)

•  $2r$  

•  $\pi\cdot r\cdot r$  

•  $\pi\cdot d$  

•  $\frac{c}{\pi}$  

The area equation is......

Area = pi* radius * ________

What is the formula for circumference of a circle given the diameter?

• C = π r
• C = 2 π r
• C = π d
• C = 2 π d

Tags

CCSS.7.G.B.4

The definition of radius is

• distance from one point to another point

• distance around the circle

• distance from the center to any point on the circle

• distance across the circle through the center

Tags

CCSS.HSG.C.A.2

The definition of diameter is

• distance from the center of any point on the circle

• distance across the circle through the center

• distance from one point to another

• distance around the circle

Tags

CCSS.HSG.C.A.2

The definition of circumference is

• distance from the center of any point on the circle

• distance from one point to another

• distance around the circle

• distance from the center of any point on the circle

Tags

CCSS.HSG.C.A.2