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Parallel Lines Cut by Transversals - Math Plane

If parallel lines cut by transversal, then altemate interior angles congruent Transitive property (from 4, 2, and 5.) "sides-angles" (if 2 angles of triangle are 2 sides of AVAT that are the same... (or, 2 angles that are congruent) Strategy: Use parallel lines cut by transversal to identify congruent angles A VAT is isosceles