Circumference and Area of a Circle

The radius is....

• a line that crosses through the center and touches each edge 

• the center point of a circle 

• a line from the center point to the edge of the circle

• an element in science

Find the circumference of a circle with a radius of 12.5 mm .

• 37.68mm

• 18.84mm

• 78.5mm

• none of the above

Tags

CCSS.7.G.B.4

The diameter of a circle is 3 centimeters. What is the circumference?

• 11.5cm2

• 9.42 cm2

• unicorns are awsome

• 45.3 cm2

Tags

CCSS.7.G.B.4

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft

• 12.25 ft

• 10.99 ft

• 8.75 ft

Tags

CCSS.7.G.B.4

What is the circumference? Round to the nearest whole number.

• 48

• 96

• 24

• 18

Tags

CCSS.7.G.B.4

Which expression could be used to find the approximate circumference of this quilt piece?

• 2π16

• 2π8

• 2(8)

• 2(4)

Tags

CCSS.7.G.B.4

What is the area of this circle?

• 163.2

• 15.3

• 124.2

• 113.1

Tags

CCSS.7.G.B.4

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

A DVD has a diameter of 15 millimeters. What is the circumference?

• c = 15π

• C = 2π15

• c = 15/π

• c = 15/2π

Tags

CCSS.7.G.B.4

Find the area of the circle.

• 43.96 units²

• 153.86 units²

• 87.82 units²

• 307.72 units²

Tags

CCSS.7.G.B.4