Practice the relationship between inscribed & central angles that are subtended by the same arc length.


A circle is centered on point B. Points A, C and D lie on its circumference.
If start color blue, angle, A, B, C, end color blue measures 40, degree, what does start color orange, angle, A, D, C, end color orange measure?
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, p, i or 2, slash, 3, space, p, i