Question

Please Help!!! Parallelograms

Answer 1

125

Explanation:

AB || DC

Thus mCDA and mDAB is co-interior angles,

i.e. their sum equals 180°

Answer 2

For this case we have to:

AB is parallel to DC

AD is parallel BC

So the angles DAB and DCB are equal. And the angles CDA and ABC are the same too (55 each)

The sum of the internal angles of a parallelogram is 360 degrees.

`55 + 55 + 2DAB = 360\\110 + 2DAB = 360\\DAB = \frac {360-110} {2}\\DAB = 125`

Answer:

125