area and circumference of circles

what is the circumference of this circle ?

• 3.14 cm 
• 37.68 cm
• 24 cm
• 68.4 cm

Tags

CCSS.7.G.B.4

Find the area of the circle

• 21.98 units²

• 153.86 units²

• 87.82 units²

• 615.44 units²

Tags

CCSS.7.G.B.4

If my diameter is 19 inches, what is my radius?

• 38 inches
• 9.5 inches
• 59.66 inches
• 119.32 inches

Tags

CCSS.7.G.B.4

If my radius is 10ft, what is my diameter?

• 20ft
• 5ft
• 31.4ft
• 62.8ft

Tags

CCSS.7.G.B.4

The diagram shows a circle with radius 8cm. Find the area of this circle, correct to 1 decimal place.

• 201.1cm²

• 50.3cm²

• 804.2cm²

• 25.1cm²

Tags

CCSS.7.G.B.4

The diagram shows a circle with diameter 16cm. Find the circumference of this circle, correct to 1 decimal place.

• 201.1cm

• 50.3cm

• 804.2cm

• 25.1cm

Tags

CCSS.7.G.B.4