MATHEMATICS M-3

• An angle is the union of two-collinear rays that have the same endpoint
• the common endpoint is called the vertex
• while rays are referred as the sides of the angle
• Adjacent angles angles that have a common side and a common vertex but have no common interior point
• Linear pair, formed by two adjacent angle which non-common sides form opposite rays
• vertical angles, pair of non-adjacent angles that have common vertex and formed by two intersecting lines
• vertical lines are congruent
• perpendicular lines, two lines that intersect forming a right angle
• true, an angle is the union of two non-collinear rays that have the same endpoint
• adjacent angles, vertical angles that have a common side and a common vertex but have no common interior point
• true, linear pair is formed by two adjacent angles which is non-common sides form opposite rays
• true, if two lines are perpendicular then they form four right angles
• TRUE,Vertical angles are pair of adjacent angles that have a common

  vertex and are formed by two intersecting lines.