Circumference of Circles and Sectors

What is the line from the centre to the edge?

• diameter

• radius

• tangent

• arc

Pi is approximately equal to?

• Threeve (a combination of 3 and five)

• 19.6

• 7.2

• 3.14

Tags

CCSS.HSG.GMD.A.1

What is the length L called?

• circumference

• tangent

• arc

• sector

Which formulas can be used to find the circumference of a circle?

• C = π r²

• C = 2π r

• C = π d

• C = 2πd

Tags

CCSS.7.G.B.4

What is the circumference of this circle?

• 8.1 m

• 15.7 m

• 10.0 m

• 31.4 m

Tags

CCSS.7.G.B.4

Diameter = _______ x Radius

• Circumference

• 
• 2

• Eleventy Seven

What is the perimeter of the semi-circle?

• 49.7 cm

• 30.8 cm

• 37.7 cm

• 26.8 cm

Tags

CCSS.7.G.B.4

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

• Diameter
• Radius

Calculate the length of the arc. Round to 2 decimal places.

• 346.36 mm
• 33.0 mm
• 32.99 mm
• 346.4 mm

Tags

CCSS.HSG.C.B.5

What is the perimeter of this semicircle? (Use 3.14 = π and round to the nearest tenths place)

• 18.5

• 11.3

• 20.3

• 22.6

Tags

CCSS.7.G.B.4