11. ABC and ADC are two right triangles with common hypotenuse AC. Prove that ∠ CAD = ∠CBD. 11. ABC and ADC are two right triangles with common hypotenuse AC. Prove that ∠ CAD = ∠CBD. October 15, 2020 Category: Chapter 10 - Circles , Maths , NCERT Class 9 ,