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Types of Geometry Angles Chris West 9/11/14 Exit Table Of Contents • • • • • • • • • • • • Angle Types We Will Cover Degrees (Angles) Congruent Angles Parallel Lines and Pairs of Angles Vertically Opposite Angles Corresponding Angles Alternate Interior Angles Alternate Exterior Angles Consecutive Interior Angles Supplementary Angles Complementary Angles Summary Exit Angle Types We Will Cover • • • • • • • • Congruent Angles Vertically Opposite Angles Corresponding Angles Alternate Interior Angles Alternate Exterior Angles Consecutive Interior Angles Supplementary Angles Complementary Angles Click To Add Exit Degrees (Angles) We can measure Angles in Degrees. There are 360 degrees in one Full Rotation(one complete circle around). Half a circle is 180 degrees. Quarter of a circle is 90 degrees(Right Angle). We often measure degrees using a protractor. Exit Congruent Angles Congruent Angles have the same angle. Exit Parallel Lines and Pairs of Angles Lines are parallel if they are always the same distance apart (called “equidistant”), and will never meet. When parallel lines get crossed by another line(which is called a Transversal), the angles can be made into pairs of angles which have special names. Exit Vertically Opposite Angles Vertically Opposite Angles are the angles opposite each other when two lines cross. Exit Corresponding Angles When two lines are crossed by another line ( called the Transversal), the angles in the matching corners are called Corresponding Angles. Exit Alternate Interior Angles When two lines are crossed by another line ( called the Transversal), the pairs of angles on opposite sides of the transversal but inside the two lines are called Alternate Interior Angles. If the two lines being crossed are Parallel Lines Then the Alternate Interior Angles are equal Exit Alternate Exterior Angles 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. If the two lines being crossed are Parallel Lines Then the Alternate Exterior Angles are equal Exit Consecutive Interior Angles 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. If the two lines being crossed are Parallel Lines Then the Consecutive Interior Angles add up to 180 degrees. Exit Supplementary Angles Two angles are Supplementary if they add up to 180 degrees. Exit Complementary Angles Two angles are complementary when they add up to 90 degrees. Exit Summary We covered the following angles: • Congruent Angles • Vertically Opposite Angles • Corresponding Angles • Alternate Interior Angles • Alternate Exterior Angles • Consecutive Interior Angles • Supplementary Angles • Complementary Angles Click To Add Exit