Find the measures of the indicated angles in circle O. Which statement is NOT true? (The figure is not drawn to scale.)

A. a = 53

B. b = 106

C. c = 73

D. d = 37

The answer should be c, because c + b angles should be equal to 180 degrees since it is an angle on o straight line since b = 1v06 then c should be 74,

It can be calculated by saying if the angle at the center and that at the edge share the same arc then the angle at the center is twice the angle at the edge of the circle, from this

it can be said that c = 2 x d

there fore the angle facing the semicircle = 90 degrees (d + 53 = 90)

so d = 37

from c = 2 x d

c=2 x 37

c = 74