in any parallelogram, vertical angles are congruent, while any two adjacent angles are supplementary. The area of a parallelogram is bh (base multiplied by height), while the perimeter is 2(b+h), or 2b+2h.
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120
In a parallelogram adjacent angles are supplementary, so angles are 75 degrees (A & C) and 105 degrees (B & D).
The 4 interior angles of a parallelogram add up to 360 degrees
The 4 interior angles of a parallelogram add up to 360 degrees