Triangle SQP is isosceles triangle. The base angles of isosceles triangle are the same. Angle SQP = Angle SPQ Angle SQP +112=180 (Sum of angles on a straight line is 180) Angle SQP = 180 - 112 Angle SQP = 68 Angle SQP + Angle SPQ + Angle QSP = 180(Sum of angles in a triangle is 180) Angle SQP = Angle SPQ =68 Angle QSP =x 68+68+x=180 136+x=180 x=180−136 x=44∘