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Proving Lines are Parallel - MathHelp.com - Geometry Help

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For a complete lesson on proving lines are parallel, go to http://www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn the converse of the parallel line postulate and the converse of each of the theorems covered in the previous lesson, which are as follows.

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Corresponding Angles of Similar Triangles | MathHelp.com

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Need a custom math course? Visit http://www.MathHelp.com. This lesson covers corresponding angles of similar triangles. Students learn that similar polygons have the same shape, and if two polygons are similar, then the corresponding angles are congruent, and the corresponding sides are in proportion.

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What are alternate exterior angles in geometry?

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Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again! Join Our Geometry Teacher Community Today! http://geometrycoach.com/Geometry-Lesson-Plans/?pa=MOOMOOMATH http://www.moomoomath.com/Alternate-Exterior-Angles.html http://www.moomoomath.com/ When two lines are crossed by a transversal, the opposite angle pairs on the outside of the lines are alternate exterior angles.

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When two lines are crossed by another line (called the Transversal): The pairs of angles on opposite sides of the transversal but outside the two lines are called Alternate Exterior Angles.

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the angles that occupy the same relative position at each intersection where a straight line crosses two others. If the two lines are parallel, the corresponding angles are equal.

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When two lines are crossed by another line (called the Transversal): The pairs of angles on one side of the transversal but inside the two lines are called Consecutive Interior Angles.

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proving lines are parallel with the converse

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proving lines are parallel with the converse

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If the alternate exterior angles are congruent, then the lines are parallel. Yes, here too we only need to find one pair of angles that is congruent. ... So, if the interior angles on either side of the transversal add up to 180 degrees, then I can use this statement to prove the lines are parallel.

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intersecting a system of lines.