Circumference and Area of circles

What is the formula for circumference of a circle given the diameter?

• C = π r
• C = 2 π r
• C = π d
• C = 2 π d

Tags

CCSS.7.G.B.4

The _____ is the distance from the center to any point on the circle.

• diameter
• radius
• π
• center

The distance across a circle through its center is called the _____.

• diameter
• radius
• π
• center

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

Ms. Catall is using a compass to find her way out of the woods. The compass has a radius of 4 centimeters. What is the compass's area?

• 49.2 cm²
• 45.6 cm²
• 50.24 cm²
• 55.9 cm²

Tags

CCSS.7.G.B.4

Steven purchases a bowl. The diameter of the
bowl is 14 cm. What is the circumference of the 
bowl?

• 28 cm
• 43.98 cm
• 87.96 cm
• 7 cm

Tags

CCSS.7.G.B.4

The circumference of a circle is

• The measurement from an edge of a circle to another edge.
• The measurement around the circle
• The measurement from an edge of a circle to another edge going through the center
• The measurement from the center of the circle to an edge of the circle

A Circle has a radius of 6 inches.  What is the area of the circle? (Best Choice)

• 3π or about 9.42 in²
• 6π or about 18.84 in²
• 12π or about 37.68 in²
• 36π or about 113.04 in² 

Tags

CCSS.7.G.B.4

A Circle has a diameter of 10 centimeters.  What is the area of the circle? (Best Choice)

• 5π or about 15.7 cm²
• 10π or about 31.4 cm²
• 25π or about 78.5 cm²
• 100π or about 314 cm² 

Tags

CCSS.7.G.B.4