Area of Circles

If the radius of a circle is 7, what is its area?

• 154.0

• 140.0

• 160.0

• 150.0

Tags

CCSS.7.G.B.4

What is the area of a circle with a radius of 8?

• 201.06 (Area = π × 8² = 201.06)

• 150.80 (Area = π × 7.5²)

• 256.00 (Area = π × 9²)

• 100.48 (Area = π × 5.7²)

Tags

CCSS.7.G.B.4

If the area of a circle is 78.54, what is the radius?

• 3

• 4

• 5

• 6

Tags

CCSS.7.G.B.4

What is the area of a circle with a radius of 12?

• 314.16

• 452.39

• 226.08

• 376.99

Tags

CCSS.7.G.B.4

What does 'π' (pi) represent in the context of circles?

• The area of a circle

• The diameter of a circle

• The ratio of the circumference of a circle to its diameter

• The radius of a circle

Tags

CCSS.HSG.GMD.A.1

How do you find the radius if you know the area of a circle?

• Radius = Area/π

• Radius = √(Area/π)

• Radius = 2 * √(Area/π)

• Radius = π * Area

Tags

CCSS.7.G.B.4

What is the formula to calculate the circumference of a circle?

• Circumference = 2 × π × r

• Circumference = π × d

• Circumference = 2 × r

• Circumference = r × r × π

Tags

CCSS.7.G.B.4

What happens to the area of a circle if the radius is doubled?

• The area remains the same.

• The area increases by a factor of two.

• The area increases by a factor of four.

• The area decreases by a factor of four.

Tags

CCSS.7.G.B.4

What is the area of a circle with a radius of 5?

• 62.83

• 78.54

• 50.27

• 31.42

Tags

CCSS.7.G.B.4

What is the area of a circle with a radius of 10?

• 250.00

• 314.16

• 300.00

• 200.00

Tags

CCSS.7.G.B.4