- Study guides, Class notes & Summaries

acute angle - An angle that has a measure greater than 0⁰ and less than 90⁰ adjacent angle - Two angles that share a common vertex and side, but have no common interior points angle - A set of points consisting of two different rays that have the same endpoint angle bisector - A ray that divides an angle into two angles that are congruent axiom - A rule that is accepted without proof between - When three points are collinear, one point is between the other two. collinear -...