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Corresponding AnglesAll corresponding angles are congruent and are equal in measure. The pairs of angles a and a ' , b and b ' , c and c ' and d and d ' are corresponding angles.(see figure below).measure of angle a = measure of angle a ' measure of angle b = measure of angle b ' measure of angle c = measure of angle c ' measure of angle d = measure of angle d ' 
Alternate Interior AnglesThe pairs of alternate interior angles in the figure below are d and d ' and c and c '. The alternate interior angles are congruent and equal in measure. (see figure below)measure of angle d = measure of angle d ' measure of angle c = measure of angle c ' 
Alternate Exterior AnglesThe pairs of alternate exterior angles in the figure below are a and a ' and b and b '. The alternate exterior angles are congruent and equal in measure. See figure below)measure of angle a = measure of angle a ' measure of angle b = measure of angle b '  More geometry references Geometry Tutorials, Problems and Interactive Applets. |
