16. Exercise Problem XI

1. In fig., \(∠ABC=69^°\), \(∠ACB=31^°\), find \(∠BDC\).

 

 

\(∠BDC=\)

 

 

2. In fig., \(A, B, C\) and \(D\) are four points on a circle. \(AC\) and \(BD\) intersect at a point \(E\) such that \(∠BEC=130^°\) and \(∠ECD=20^°\). Find \(∠BAC\).

 

 

\(∠BAC=\)