Circumference vs. Area of a Circle

Does this picture show the diameter or radius of a circle?

• Diameter
• Radius

Tags

CCSS.HSG.GPE.A.1

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side

Tags

CCSS.7.G.B.4

The radius of the circle is 9 meters. What is the circle's circumference? Use 3.14 for 𝛑.

• 9 meters

• 28.26 meters

• 56.52 meters

• 18 meters

If the diameter of a circle is 10 mm, the circumference is approximately ___

• 314 mm
• 3.14 mm
• 31.4 mm
• 20 mm

Tags

CCSS.7.G.B.4

The diameter of a circle is 3 centimeters. What is the circumference? Keep your answer in terms of 𝛑.

• 9𝛑 cm

• 9.42𝛑 cm

• 3𝛑 cm

• 45.3𝛑 cm

What is the formula for area of a circle given the radius?

• A = πr
• A = 2πr
• A = πd
• A = πr²

Tags

CCSS.7.G.B.4

What is the area of this circle? Use 3.14 for 𝛑

• 82.13 m²

• 78.50 m²

• 314.16 m²

• 170.12 m²

How can you write π as a decimal?

(a)  

Find the area of the circle below. Keep your answer in terms of 𝛑 (pi).

• 100 cm²

• 225 cm²

• 9𝛑 cm²

• 28.26𝛑 cm²

What is the difference between the CIRCUMFERENCE and the AREA of a circle?

Tags

CCSS.7.G.B.4