Circles

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

• Radius
• Diameter

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

• Radius
• Diameter

Tags

CCSS.HSG.C.A.2

If the diameter of a circle is 10 cm, the radius is 5 cm.

• TRUE
• FALSE

Tags

CCSS.7.G.B.4

If the radius is 4, the diameter is

• 2

• 4

• 8

Tags

CCSS.7.G.B.4

What is the circumference of a circle?

• the distance around a circle

• the area of a circle

• halfway through a circle

• a line through the center of a circle

What is the formula for finding the circumference of a circle?

• C = r²

• C = rd

• A = π·r²

• C = π·d

Tags

CCSS.7.G.B.4

Find the circumference with a radius of 5.8 cm. Use 3.14 for pi.

• 37 cm

• 38.3 cm

• 36.4 cm

• 42.7 cm

Tags

CCSS.7.G.B.4

Find the circumference with a diameter of 18.4 km. Use 3.14 for pi.

• 23.7 km

• 57.8 km

• 19.3 km

• 59.1 km

Tags

CCSS.7.G.B.4

What is the formula for areaof a circle given the radius?

• A = πr

• A = 2πr

• A = πd

• A = πr²

Tags

CCSS.7.G.B.4

find the area of the circle below.

• 100 cm
• 225 cm
• 9 cm
• 28.26 cm

Tags

CCSS.7.G.B.4