Radians

Question 1

Equation for arc length

Answer 1

radius x angle(in radians)

Question 2

Equation for area of a sector

Answer 2

1/2 x radius^2 x angle(in radians)

Question 3

Equation for area of a segment

Answer 3

1/2 x radius^2 x (angle - sin(angle)) (angles in radians)