Find all interior angles of triangle ADD'. The size of angle x is equal to 127 degrees and the size of angle y is equal to 115 degrees. In the figure below lines BC and DD' are parallel. Parallel lines angles with letters A transversal creates eight angles when it cuts through a pair of parallel. Supplementary (add up to 180 degrees) Co-exterior angles on parallels are. Parallel lines angles with numbers With letters, the angles are labeled like this. Consecutive angles are not supplementary. A pair of angles that lie outside of parallel lines and on the same side of a transversal. When that happens, corresponding angles will be congruent to. are always congruent.) Transversal between non-parallel lines.
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