Measure Figures

a straight line from the center to the circumference of a circle or space

• Diameter

• Chord

• Radius

• Tangent

What is the diameter?

• 8
• 16
• 10
• 4

What is the radius?

• 18
• 72
• 38
• 14

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

• Radius
• Diameter

Tags

CCSS.HSG.C.A.2

What is the distance around a circle?

• Circumference
• Area
• Diameter
• Radius

What two formulas can you use to find the circumference?

• C = π·d

• C = π·r²

• C = 2·π·r

• C = d²

Tags

CCSS.7.G.B.4

Find the circumference of the circle.

• 31.4 cm

• 78.5 cm

• 314 cm

• 15.7 cm

Tags

CCSS.7.G.B.4

Find the circumference of the circle.

• 78.5 cm

• 15.7 cm

• 7.85 cm

• 19.6 cm

Tags

CCSS.7.G.B.4

Find the circumference of the circle.

• 38.47 cm

• 10.99 cm

• 43.96 cm

• 21.98 cm

find the area of the circle below.

• 100 cm
• 225 cm
• 9 cm
• 28.26 cm