Theorems regarding parallel and perpendicular lines.
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| If two parallel lines are crossed by a transversal, then alternate interior angles are... | congruent.
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| If two parallel lines are crossed by a transversal, then corresponding angles are... | congruent.
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| If two parallel lines are crossed by a transversal, then alternate exterior angles are... | congruent.
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| If two parallel lines are crossed by a transversal, then same side interior angles are... | supplementary.
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| If two parallel lines are crossed by a transversal, then same side exterior angles are... | supplementary.
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| If two lines intersect, then... | vertical angles are congruent.
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| If two lines and a transversal form alternate interior angles that are congruent, then... | the lines are parallel.
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| If two lines and a transversal form alternate exterior angles that are congruent, then... | the lines are parallel.
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| If two lines and a transversal form same side interior angles that are congruent, then... | the lines are parallel.
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| If two lines and a transversal form same side exterior angles that are congruent, then... | the lines are parallel.
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| If two lines and a transversal form corresponding angles that are congruent, then... | the lines are parallel.
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| If two lines are parallel to the same line, then... | they are parallel to each other.
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| In a plane, if two lines are perpendicular to the same line, then... | they are parallel to each other.
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| In a plane, if a line is perpendicular to one of two parallel lines, then... | it is perpendicular to the other.
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Created by:
mburke79
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