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Theorems

TermDefinition
Same-Side Interior Angles if two lines are parallel, the the interior angles on the same side equal 180
Alternate interior angles if a transversal intersects two parallel lines, then alternate interior angles are congruent
corresponding anlges if a transversal intersects two parallel lines, then corresponding angles are congruent
alternate exterior angles if a transversal intersects two parallel lines, then alternate exterior angles are congruent
converse of the corresponding angles if two lines and a transversal form alternate interior angles that are congruent, then the two lines are parallel
converse of the alternate interior angles if two lines and a transversal form alternate interior angles that are congruent, then the two lines are parallel
converse of the consecutive interior angles if two lines and a transversal form same-side interior angles that are supplementary, then the two lines are parallel.
converse of the alternate exterior angles if two lines and a transversal form alternate exterior angles that are congruent, then the two lines are parallel
parallel line theorem in a plane, if two lines are parallel to the same line, then they are parallel to each other.
perpendicular to a third line in a plane, if two lines are perpendicular to the same line, then they are parallel to each other.
perpendicular transversal in a plane, if a line is perpendicular to one of two parallel lines, then it is also perpendicular to the other
parallel postulate through a point not on a line, there is one and only one parallel to the given line.
triangle angle-sum the sum of the measures of the angles of a triangle is 180
triangle exterior angles the measure of each exterior angle of a triangle equals the sum of the measures of its two remote interior angles.
Created by: user-1982149
 

 



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