Circle

What is pi used to find? 

• the perimeter of a square

• the area of a rectangle

• radius of a circle

• circumference of a circle

Tags

CCSS.7.G.B.4

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius

What is the formula for finding the circumference of a circle?

• C = r²

• C = rd

• A = π·r²

• C = π·d

Tags

CCSS.7.G.B.4

What is the formula for finding the area of a circle?

• A = π·d

• C = 2·π·r

• A = π·r²

• C = π·d

Tags

CCSS.7.G.B.4

Label the name of part os the circles.

c

d

e

f

g

h

i

b

a

diameter

segment

secant

radius

tangent

chord

center

sector

circumference

Label the picture.

a

b

c

d

e

f

Secant

Chord

Center

Tangent

Radius

Minor Arc

Find the area of the circle.

• 18.84 m²

• 113.04 m²

• 37.68 m²

• 452.16 m²

Tags

CCSS.7.G.B.4

What is the "formal" definition of pi?

• 22/7

• 3.1415926

• the ratio of a circle's circumference to its diameter

• the surface area of a sphere of diameter 22/7

Tags

CCSS.HSG.GMD.A.1

What do you get when you divide the circumference of a Jack-o-Lantern by its diameter?

• Pumpkin

• Jack-o-Lantern

• Pumpkin Pi

• Pi in the Sky

What is the formal definition of pi? 

• The ratio of a circle's circumference to  its diameter

• 3.14159

• The radius of a unit circle

• The ratio of a circles diameter to its area

Tags

CCSS.HSG.GMD.A.1