The angles in a parallelogram add up to 360 degrees
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Because its 4 interior angles must add up to 360 degrees
In a parallelogram, opposite angles are equal. Since two angles measure 40 degrees each, the opposite angles are also 40 degrees. Therefore, the measures of the other two angles in the parallelogram are also 40 degrees each.
You cant tell. There are an infinite number of parallelograms.The only thing you know is that all four interior angles add up to 360 degrees.Also, I guess, any two adjacent interior angles add up to 180 degrees.
The interior angles of a triangle add up to 180 degrees. The exterior angles of a triangle add up to 360 degrees.
Not unless the parallelogram is a rectangle. In every parallelogram, consecutive angles are supplementary.