Given: Two angles of a right angled triangle other than right angle are (5x+9)° and (9x+11)° . Formula: Sum of two angles of a right angled triangle other than right angle is 90°. Calculation: According to the question (5x+9)°+(9x+11)°=90° ⇒5x+9+9x+11=90° ⇒14x=90°−20° ⇒x=70°/14 ∴x=5°