11. ABC and ADC are two right angled triangles with common hypotenuse AC. Prove that $$\angle{CAD}$$ = $$\angle{CBD}$$.
$$\triangle{ADC}$$ and $$\triangle{ABC}$$ are right angled triangles with common hypotenuse.
$$\angle{CBD}$$ = $$\angle{CAD}$$ ...(Since, angles in the same segment are equal)