Circle Formulas

Which is the correct formula for the area of a circle?

• A = π r²

• A = 2π r²

• A=πd

• A=π d²

Tags

CCSS.7.G.B.4

Which formulas can be used to find the circumference of a circle?

• C = π r²

• C = 2π r

• C = π d

• C = 2πd

Tags

CCSS.7.G.B.4

Which formula can be used to find the the measure of the angle shown?

• angle = 1/2(arc)

• angle = 1/2(arc + arc)

• angle = 1/2(big - small)

• angle = arc

Which formula is used to find the measure of the angle shown?

• angle = 1/2(arc)

• angle = 1/2(arc + arc)

• angle = 1/2(big - small)

• angle = arc

Which formula can be used to find the measure of an angle in the circle shown?

• angle = 1/2(arc)

• angle = 1/2(arc + arc)

• angle = 1/2(big - small)

• angle = arc

Which formula can be used to find the length of the chords in the circle?

• a∙b = c∙d

• outside∙whole = outside ∙ whole

• angle = 1/2(arc + arc)

• angle = 1/2(big - smal)

Which formula can be used to find the measure of the angle in the diagram?

• angle = 1/2(arc)

• angle = 1/2(arc + arc)

• angle = 1/2(big - small)

• angle = arc

Which formula can be used to find the length of the secants in the diagram?

• a∙b=c∙d

• outside∙whole=outside∙whole

• angle = 1/2(arc + arc)

• angle = 1/2(big - small)

Tags

CCSS.HSG.C.A.2

Which formula is used to find the area of a sector?

• A = π r²

• A = n/360 πr²

• A = 360/n πr²

• A = n/360 πd