ANGLE SUBTENDED BY ARC AT THE CENTRE IS 
TWICE THE ANGLE SUBTENTED BY IT ON THE REMAINING 
PART OF THE CIRCLE

PREPARED BY BINDU SHIVRAJAN  COPYRIGHT-CC by SA

ANGLE = 3.141592653589793 rad (slider from 0 to 180°)
RADIUS1 = 10 (slider from 1 to 10)
D = (17.672376671702718, -0.3312900134400985)
c = Circle(D, RADIUS1)
E = Point(c)
ANGLE1 = 2.652900463031381 rad (slider from 0 to 6.283185307179586)
E' = Rotate(E, ANGLE1, D)
δ = Angle(E, D, E')
j = Segment(E, D)
k = Segment(D, E')
G = Point(c)
ε = Angle(E, G, E')
l = Segment(E, G)
m = Segment(G, E')
text2: "CENTRAL ANGLE = " + δ + ""
text3: "ANGLE SUBTENDED ON THE
 REMAINING PART OF THE CIRCLE=" + ε + ""