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10-60.

Examine the diagram at right. If point is the midpoint of and if , prove that . Write your proof in flowchart format.

Recall that vertical angles are congruent.

What is the definition of a midpoint?

Two lines K, Q and P, L intersect at point, M, forming two triangles, K, M, L, and M, P, Q. Angles P and L are equal.