Vocabulary

=Session I Vocabulary=
 * Right angle - has an exact measurement of 90 degrees
 * Acute angle - has a measurement between 0 and 90 degrees
 * Obtuse angle - has a measurement between 90 and 180 degrees
 * Reflex angle - has a measurement greater than 180 degrees but less than 360 degrees
 * Protractor - a tool used to measure angles

=Session II Vocabulary=
 * Vertex - the meeting point of two lines or rays
 * Degree - unit of measure for angles
 * Right angle - has an exact measurement of 90 degrees
 * Acute angle - has a measurements between 0 and 90 degrees
 * Obtuse angle - has a measurement between 90 and 180 degrees
 * Reflex angle - has a measurement greater than 180 degrees but less than 360 degrees
 * Protractor - a tool used to measure angles

=Session III Vocabulary=
 * Point - geometric object that has no dimensions, only a location
 * Line - collection of points along a straight path, having no endpoints
 * Plane - flat surface that extends endlessly in all directions; Plane geometry deals with 2-dimensional figures
 * Space - set of all points; Space geometry deals with 3-dimensional figures
 * Line segment - a part of a line that has two endpoints
 * Ray - part of a line that has only one endpoint
 * Angle - two rays joined with a common endpoint
 * Straight angle - has the exact measure of 180 degrees
 * Vertex - the point on an angle where the two sides intersect
 * Perpendicular lines - two intersecting lines that form right angles
 * Intersecting lines - lines that have just one point in common
 * Parallel line - lines that lie in the same plane but never intersect
 * Congruent angles - angles that have the same measure
 * Complementary angles- two or more angles whose sum is 90 degrees
 * Supplementary angles - two or more angles whose sum is 180 degrees
 * Adjacent angles - two angles that share both a side and a vertex