Circle Formulas Review

Which is the correct formula to answer the question?

• Central = arc

• 2 * inscribed = arc

Which is the correct formula to answer the question?

• Central = arc

• 2 * inscribed = arc

Which is the correct formula to answer the question?

• Central = arc

• 2 * inscribed = arc

Given the picture and that segment TR is a diameter, find the measure of arc TAG. Is it a major arc, minor arc, or semicircle?

• 180°;

  Semicircle

• 339°;

  Major Arc

• 21°;

  Minor Arc

• 381°;

  Minor Arc

If Angle NOQ = 40, what is the measure of Arc NQ?

• 20

• 40

• 60

• 80

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

• R = d²

• R = d ÷ 2

• R = π d

• R = 2 d

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

• D = r²

• D = r ÷ 2

• D = π r

• D = 2 r

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

• C = π r²

• C = 2 π r

• C = π d

• C = 2 π d

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

• C = π r

• C = 2 π r

• C = π d

• C = 2 π d

What is the formula for area of a circle?

• A = π r²

• A = 2 π r

• A = π d

• A = 2 π d