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|_CAB= 180-125 = 55°
|_BDC=( 180- |_CAB )= 125°
All quadrilaterals' interior angles sum to 360°. In isosceles trapezoids, the two top angles are equal to each other.
Similarly, the two bottom angles are equal to each other as well.
Therefore, to find the sum of the two bottom angles, we subtract the measures of the top two angles from 360:
|_BDC= 125° = |_ACD
|_CAB = 55°= |_ABD
X= ABD= 55°
Y=BDC= 125°
Z=ACD= 125°
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