Two angles that add up to 90 degrees
A pair of opposite angles made when two lines cross. They will always be equal
two angles that share the same vertex and have a common side
two angles in the same location at two different intersections made by a transversal crossing parallel lines.
two angles that add up to 180 degrees
interior angles of a triangle
Three angles that always add up to 180 degrees
a straight line, which measures 180 degrees
a line that passes through two lines in the same plane at two distinct points
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MATHS - Geometry, Probability and complex algebra