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7-1. Points, Lines, and Planes. Course 2. Warm Up. Problem of the Day. Lesson Presentation. 7-1. Points, Lines, and Planes. Course 2. Warm Up What geometry term might you associate with each object? 1. one edge of a cardboard box 2. the floor 3. the tip of a pen.

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  1. 7-1 Points, Lines, and Planes Course 2 Warm Up Problem of the Day Lesson Presentation

  2. 7-1 Points, Lines, and Planes Course 2 Warm Up What geometry term might you associate with each object? 1.one edge of a cardboard box 2. the floor 3. the tip of a pen line segment or line plane or rectangle point

  3. 7-1 Points, Lines, and Planes Course 2 Problem of the Day Remove 4 of the segments to leave 5 equal squares.

  4. 7-1 Points, Lines, and Planes Course 2 Learn to identify and describe geometric figures.

  5. 7-1 Points, Lines, and Planes Course 2 Insert Lesson Title Here Vocabulary point line ray line segment plane congruent

  6. 7-1 Points, Lines, and Planes XY, or YX Helpful Hint Use two points on the line to name a line. X Y A number line is an example of a line. Course 2 A point is an exact location in space. It is usually represented as a dot, but it has no size at all point A Use a capital letter to name a point. • A A lineis a straight path that extends without end in opposite directions.

  7. 7-1 Points, Lines, and Planes GH Name the endpoint first when naming a ray. G H LM, or ML Use the endpoints to name a line segment. L M Course 2 A ray is a part of a line. It has one endpoint and extends without end in one direction. A line segmentis part of a line. or a ray that extends from one endpoint to another.

  8. 7-1 Points, Lines, and Planes Q S R Helpful Hint A coordinate plane is an example of a plane. Course 2 A plane is a perfectly flat surface that extends infinitely in all directions. plane QRS Use three points in any order, not on the same line, to name a plane.

  9. 7-1 Points, Lines, and Planes Course 2 Additional Example 1: Identifying Points, Lines, and Planes Identify the figures in the diagram. D E F A. three points D, E, and F Choose any two points on a line to name the line. B. two lines DE, DF Choose any three points, not on the same line, in any order. C. a plane plane DEF

  10. 7-1 Points, Lines, and Planes Course 2 Insert Lesson Title Here Try This: Example 1 Identify the figures in the diagram. G H I F A. four points H, G, I, and F Choose any two points on a line to name the line. B. two lines IH, HF Choose any three points, not on the same line, in any order. C. a plane plane IGF

  11. 7-1 Points, Lines, and Planes Course 2 Additional Example 2: Identifying Line Segments and Rays Identify the figures in the diagram. M N O A. three rays Name the endpoint of a ray first. MN, NM, MO B. two line segments Use the endpoints in any order to name a segment. MN, MO

  12. 7-1 Points, Lines, and Planes Course 2 Try This: Example 2 Identify the figures in the diagram. D C A. three rays Name the endpoint of a ray first. B A BC, CA, BD B. three line segments Use the endpoints in any order to name a segment. BA, CA, BD

  13. 7-1 Points, Lines, and Planes Course 2 Figures are congruent if they have the same shape and size. If you place one on top of the other, they match exactly. Line segments are congruent if they have the same length. Tick marks are used to indicate congruent line segments. In the illustration below, segments that have the same number of tick marks are congruent. Line segments AB and BC are congruent (one tick mark), and line segments MN and OP are congruent (two tick marks). B 5 ft N O 20 m 20 m 3 ft 3 ft C P A M 8 ft 16 m

  14. 7-1 Points, Lines, and Planes A B AB CD E F ACBD C D BF DF EC AE Reading Math The symbol means “is congruent to.” Course 2 Additional Example 3: Identifying Congruent Line Segments Identify the line segments that are congruent. One tick mark Two tick marks Three tick marks

  15. 7-1 Points, Lines, and Planes A AB AC BCDE B C BD CE E D Course 2 Insert Lesson Title Here Try This: Example 3 Identify the line segments that are congruent. One tick mark Two tick marks Three tick marks

  16. 7-1 Points, Lines, and Planes AD, BE, CF Possible answer: GA, GB, GC Possible answer: AG, AD, DG, BG Course 2 Insert Lesson Title Here Lesson Quiz Use geometric notation to identify figures. B A 1. lines C G 2. plane F Possible answer: plane ABG D E 3. three rays 4. four line segments 5. How many planes, lines, and points are suggested by the sides, edges, and corners of an ordinary box? 6 planes, 12 lines, 8 points

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