# Math Help - please solve this from circle chapter

1. ## please solve this from circle chapter

1) triangle ABC is a right angled at B. on AC, a point D is taken so that AD = DC and AB = BD. find m(< CAB).

2. BD is the median through the right angle af the triangle. Then $BD=AD=DC$. But $AB=BD$, then the traingle is equilateral. That means $\widehat{CAB}=60^{\circ}$

3. Originally Posted by red_dog
BD is the median through the right angle af the triangle. Then $BD=AD=DC$. But $AB=BD$, then the traingle is equilateral. That means $\widehat{CAB}=60^{\circ}$