Intro to Circles and Circumference

The best way to demonstrate that all circles are similar is to show that

• they're all round

• they all have centers

• a combination of transformations can 'make' one circle become another

• since pi is 3.14, and pies are round and circular, then it's obvious

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

The distance around a circle is the ______________.

• length

• area

• circle

• circumference

Find the circumference of a circle with a radius of 13.5 mm.

• 84 mm

• 84.58 mm

• 84.78 mm

• 85

Tags

CCSS.7.G.B.4

What is the circumference of a circle with a radius of 54 m?

• 339.12 m

• 340.56 m

• 342.78 m

• 345.39

Tags

CCSS.7.G.B.4

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's approximate circumference?

• 3 m

• 20.42 m

• 37.68 m

• 18.84 m

Tags

CCSS.7.G.B.4

Find the circumference of the circle.

• 43.96 in.

• 87 in

• 87.92 in.

• 97.02 in.

Tags

CCSS.7.G.B.4

What is the circumference of this circle ?

• 3.14 cm

• 37.68 cm

• 24 cm

• 68.4 cm

Tags

CCSS.7.G.B.4

The radius is 8 inches.  What is the circumference?

• 50.24 inches

• 25.12 inches

• 12.56 inches

• 200.96 inches

Tags

CCSS.7.G.B.4

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

• 11.5 cm

• 9.42 cm

• 18.84 cm

• 45.3 cm

Tags

CCSS.7.G.B.4

The local rodeo has a circular pin, with a diameter of 48 feet, in which they keep the horses. What is the circumference of the horse pin?

• 150.72 feet

• 140.72 feet

• 130.72 feet

• 160.72 feet

Tags

CCSS.7.G.B.4