Stage 9 - Q10 - 3 marks
19436
Internal bisectors from B and C meet at the marked point \(I\). Angle B is twice angle \(A\), and angle \(BIC\) is three times angle \(A\). Find all triangle angles, angle \(BIC\) and the adjacent acute crossing angle.
A
B
C
Hint
The condition on angle \(BIC\) determines A before the condition on B is needed.