## Problem of the Day #77: Triangles and Angles
*June 4, 2011*

*Posted by Aziz in : potd , trackback*

If $\angle B’EC$ and $\angle ABA’$ are right angles, find the measure of $\angle CDB$.

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## Problem of the Day #77: Triangles and Angles
*June 4, 2011*

*Posted by Aziz in : potd , trackback
*

If $\angle B’EC$ and $\angle ABA’$ are right angles, find the measure of $\angle CDB$.

## Comments»

Is DAB a straight line?

No