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15 Cards in this Set
 Front
 Back
Vertical Angles Theorem

Vertical Angles are Congruent


Ext. Angle Theorem1

The measure of each exterior angle of a triangle equals the sum of the measures of its two remote interior angles


Isosceles Triangle Theorem

If two sides of a triangle are congruent, then the angles opposite those sides are also congruent.


Converse of Isosceles Triangle Theorem

If two angles of a triangle are congruent, then the sides opposite the angles are congruent.


Theorem 45

If two angles of one trinagle are congruent to two angles of another triangle, the the third angles are congruent.


Theorem 46

All right angles are congruent.


Corresponding Angles Postulate

If two parallel lines are cut by a transversal, then corresponding angles are congruent.


Alternate Interior Angles Theorem

If two parallel lines are cut by a transversal, then alternate interior angles are congruent.


SameSide Interior Angles Theorem

If two parallel lines ae cut by a transversal, then the pairs of sameside interior angles are supplemetary.


Converse of Corresponding Angles Postulate

If two lines are cut by a transversal, so that a pair of corresponding angles are congruent,then the lines are parallel.


Converse of Alternate Interior Angles Theorem

If two lines are cut by a transversal so that a pair of alternate interior angles are congruent, then the lines are parallel.


Euclid's Parallel Postulate

Through a point not on a line, there is one and only one line parallel to the given line.


Spherical Geometry Parallel Postulate

Through a point not on a line, there is no line parallel to the given line


AngleAngle Similarity postulate

If two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar


SideAngleSide Similarity Theorem

If an angle of one tirangle is congruent to an angle of a second triangle, and the sides including the wo angles are proportional, then the triangles are similar.
