Question 8Let the two base angles of a triangle be $A$ and $B,$ with $B$ larger than $A.$ The altitude to the base divides the vertex angle $C$ into two parts, $C_1$ and $C_2,$ with $C_2$ adjacent to side $a.$ Then:$C_1+C_2=A+B$$C_1-C_2=B-A$$C_1-C_2=A-B$$C_1+C_2=B-A$$C_1-C_2=A+B$