Slide 2:
Points An exact position or location
Slide 3:
Lines and Rays RAY: A part of a line, with one endpoint, that continues without end in one direction LINE: A straight path extending in both directions with no endpoints LINE SEGMENT: A part of a line that includes two
points, called endpoints, and all the points between them
Slide 4:
More about Lines INTERSECTING LINES: Lines that cross PARALLEL LINES: Lines that never cross and are always the same distance apart
Perpendicular Lines :
Perpendicular Lines Two lines that intersect to form four right angles
Slide 6:
What is it? Ray Line Intersecting Lines Parallel Lines Line Segment
Slide 7:
Angles The figure formed when two rays share the same endpoint Right Angle:
An angle that forms a square corner Acute Angle:
An angle less than a right angle Obtuse Angle:
An angle greater than a right angle
Slide 8:
Right Angle or Not? Right Angle Right Angle Not! Not! Not! Not!
Slide 9:
Right, Acute or Obtuse? Right Angle Right Angle Obtuse
Greater Acute
Less Acute
Less Obtuse
Greater
Slide 10:
Biblilography Harcourt Math Multimedia Glossary