Find \(\angle B\) and \(\angle C\) if \(A\) is the centre of the circle and \(\angle A = 42^\circ\).
 
circle_triangle_abc-v3.png
 
Answer:
 
(a) The measure of \(\angle B\) is
 
(b) The measure of \(\angle C\) is
 
Answer variants:
\(59^\circ\)
\(69^\circ\)
\(79^\circ\)
\(99^\circ\)