Area and circumference of circles

What formula do you use to find the AREA of a circle?

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

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 circumference of a circle with a radius of 12.5 mm .

• 37.68mm
• 18.84mm
• 78.5mm
• none of the above

Tags

CCSS.7.G.B.4

The radius of a circle is

• The measurement from the center of a circle to an edge of the circle.
• The measurement around the circle
• The measurement from and edge of the circle to another edge through the center
• A line perpendicular to the diameter of the circle

Tags

CCSS.4.G.A.1

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2
• Divide the diameter by 2
• Add 2 to the diameter
• Subtract 2 from the diameter

Tags

CCSS.7.G.B.4

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

• Radius
• Diameter

Tags

CCSS.HSG.C.A.2

What is π ? (Best Choice)

• The ratio of the circumference of any circle to its diameter.
• Exactly 3.14
• Exactly 3.1415
• Exactly 3.141593

Tags

CCSS.HSG.GMD.A.1

Find the circumference of a circle with a diameter of 11 millimeters.

• 34.6 mm
• 30 mm
• 25.3 mm
• 34.54 mm

Tags

CCSS.7.G.B.4