Abcd is a rectangle. the length of bd is 8 units, and m angle abd is 67°. the length of ac is units, and m angle cdb is °.

The length of AC is 8 units The angle CDB is 67° Since ABCD is a rectangle, that means that all of the angles are 90 degrees and that line segment AB is parallel to line segment CD. The line segment BD is a diagonal of the rectangle. The line segment AC is also a diagonal of the rectangle so it has the same length as given for segment BD which is 8. The angle ABD is the angle between the horizontal line and the diagonal. The angle CDB is also the angle between a horizontal line and the diagonal. So it also has the same measurement so it too is 67°.

The answer is part a: use