Now use the information you already have about finding the equation of a line and apply it to the dashed lines shown in these triangles ... The perpendicular bisector passes through the midpoint ...
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Congruent Angles: Definition, Symbol and Key TheoremsThis angle bisector between two arms at 90 degrees (right angle) makes it easier to see how the inverse angles are complementary instead of complex-angled shapes like isosceles triangles.
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