Area Circumference and Parts of a Circle

In words, describe this formula

• The area of a circle is equal to pi times the radius squared

• The circumference of a circle is equal to the pi times the diameter.

• The circumference of a circle is equal to pi times the radius squared

• The area of a circle is equal to pi times the diameter

Tags

CCSS.7.G.B.4

Choose the answer which best describes how these formulas are related to each other.

• They both solve for circumference. In the first formula it uses diameter, in the second formula it uses two times the radius, which is the same thing as diameter.

• They both solve for circumference, in the first uses diameter and the second uses pi.

• They both solve for area. In the first formula it uses diameter, in the second formula it uses two times the radius, which is the same thing as diameter.

• They both use circumference to solve for pi. One uses radius, the other uses diameter.

Tags

CCSS.7.G.B.4

Find Circumference. Watch the units.

• 37.68 m²

• 37.68 m

• 18.84 m

• 18.84 m²

Tags

CCSS.7.G.B.4

What is the actual definition of this sign?

• It's the line going across the circle and going through the center

• It's the line going from the center to the edge of a circle

• It's the ratio of the circumference to the diameter of a circle.

• It's any line that goes through the circle but doesn't go through the middle.

Tags

CCSS.HSG.C.A.2

How many degrees are there in a circle?

• 90

• 180

• 360

• 720

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Find Circumference. Leave answer in terms of pi (π).

• 36π

• 9π

• 4.5π

• 18π

Tags

CCSS.7.G.B.4

Find Circumference. Leave answer in terms of pi (π)

• 36π

• 12π

• 6π

• 24π

Tags

CCSS.7.G.B.4

What is the line that goes from the center of a circle to any point on the circle?

• Diameter

• Circumference

• Chord

• Radius

What is the diameter?

• 8

• 16

• 10

• 4

Tags

CCSS.7.G.B.4

What is the radius?

• 18

• 72

• 38

• 14

Tags

CCSS.7.G.B.4