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360 degrees. This complies with the rules of parallelograms. A parallelogram is a quadrilateral comprised of two sets of parallel lines. The opposite sides of a parallelogram are congruent, meaning that they have the same shape and size. The opposite angles are also congruent. Additionally, its consecutive angles are supplementary. This means that when when you add the two angles next to each other together, they will add up to 180 degrees, or a straight line. Since there are 4 corners in a parallelogram, and therefore 4 angles, you would have two sets of 180 degrees. Ergo, the angles in a parallelogram always add up to 360 degrees.

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9y ago
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Q: How many degrees does a parallelogram have to add up to?
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