Question 147
In acute triangle $ABC$, the three altitudes meet at $H$. Given that $AH = BC$, calculate at least one of the angles of $\triangle ABC$.
Answer: $\angle A = 45^{\circ}$ (angles $B$ and $C$ cannot be determined).
Answer: $\angle A = 45^{\circ}$ (angles $B$ and $C$ cannot be determined).