find the radius of the circle if length of arc is 4p cm and angle made by the arc at
the centre is 40 deg.find the area made by the arc.
40° = 2π/9, so since
s = rθ, sol for r:
4π = 2π/9 r
r = 18
the centre is 40 deg.find the area made by the arc.
s = rθ, sol for r:
4π = 2π/9 r
r = 18