Circles

Question 1

Circumference of the circle

Answer 1

2 π r

Question 2

Area of the circle

Answer 2

π r2

Question 3

Area of a sector of a circle with radius r and angle with degree measure θ

Answer 3

(θ/360) × π r2

Question 4

Length of an arc of a sector of a circle with radius r and angle with degree measure θ

Answer 4

(θ/360) × 2 π r

Question 5

Area of segment of a circle

Answer 5

Area of the corresponding sector – Area of the corresponding triangle