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Published byKelley Smith Modified over 9 years ago
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9-2-2014 HOPE YOU HAD A GREAT HOLIDAY PLEASE PICK UP NOTES ON BACK SHELF PLEASE TURN IN YOUR INITIAL HW TO THE TRAY.
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DISTANCE AND LENGTH DAY 1- VOCABULARY AND INTRO TO SEGMENT ADDITION POSTULATE.
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LEARNING GOALS Be able to identify and label parallel and perpendicular lines. Be able to identify and label line segments, rays and opposite rays. Know the definition of midpoint / bisector Use basic operations with the Segment Addition Postulate.
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PARALLEL LINES Two coplanar lines that never intersect. How can we name these parallel lines?
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PERPENDICULAR LINES Two lines that intersect to form right angles (90 Degrees) Can you name a set of perpendicular lines?
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LINE SEGMENT Portion of a line with 2 endpoints Named by the 2 endpoints with a line on top
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RAY - Ray – portion of a line with one end point and extends forever in the other direction. Opposite rays- 2 rays when put together form a straight line. They share a common endpoint.
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MIDPOINT / BISECTOR Midpoint- A point on a line segment that divides the segment perfectly in half. Bisector – a line that cuts another line in half, it goes through the midpoint.
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AB VS. AB What is the difference between the two names above? First – AB simply states two points A and B The second is labeling a line segment with endpoints A and B.
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EXAMPLES Name 2 sets of parallel lines Name 2 sets of perpendicular lines. Name 4 line segments. Name 4 rays. Name a set of opposite rays.
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SEGMENT ADDITION POSTULATE
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EXAMPLES
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SUMMARY In the SUMMARY SECTION Please summarize todays notes and think of any questions you may have while I pass out the assignment. HW is will be graded in class tomorrow.
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WHAT YOU SHOULD KNOW….. How to identify and name parallel and perpendicular lines Line segments, rays, opposite rays The definition of midpoint / bisector. Basic operation of the SEGMENT ADDITION POSTULATE.
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