A vertical angle is perpendicular to a horizontal base and equals 90 degrees
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Vertical angles are not always complementary. In some cases, they will congruent and supplementary which makes them 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.
No, the angles in a quadrilateral add up to 360 degrees. The angles in a triangle add up to 180 degrees.
Exterior angles add up to 360 degrees Interior angles add up to 1080 degrees
The angles in a parallelogram add up to 360 degrees