Circumference and 2D Figures

What is the formula for finding diameter?

• r=2d

• d=2r

• d=2d

Tags

CCSS.7.G.B.4

find the circumference of a circle with a diameter of 12mm .

• 37.68mm

• 18.84mm

• 75.36mm

• none of the above

Answer explanation

C= πd

Tags

CCSS.7.G.B.4

What is the circumference of a circle with a radius of 12.7 m?

• 79.76 m

• 80.34 m

• 14.56 m

• 80.00 m

Answer explanation

C= 2πr

Tags

CCSS.7.G.B.4

What is the circumference of a circle with a diameter of 92 in?

• 288.9 in

• 176.8 in

• 165.8 in

• 186.8 in

Answer explanation

C= πd

Tags

CCSS.7.G.B.4

The distance AROUND an object is called the 

• area

• perimeter or circumference

• volume

What is the circumference?

• 50.24

• 25.12

• 200.96

• 16

Answer explanation

C=πd or C=2πr

Tags

CCSS.7.G.B.4

A circle has a radius of 4 inches. What is the diameter?

• 2 inches

• 8 inches

• 12.56 inches

• 6.28 inches

Answer explanation

d=2 x r

Tags

CCSS.7.G.B.4

what is the formula for finding diameter

• r = 2 d

• d = 2 r

• a = m c²

• c = π 2 r

Tags

CCSS.HSG.C.A.2

what is the formula for finding radius

• c = π d

• c = 2 π r

• d = r/2

• r = d/2

Tags

CCSS.7.G.B.4

What is the area of this circle?

• 82.13

• 78.5

• 314.16

• 170.12

Answer explanation

$A=\pi r^2$

Tags

CCSS.7.G.B.4