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Chapter 1-1 (Identifying Points, Lines, & Planes)

Chapter 1-1 (Identifying Points, Lines, & Planes). What is the difference between a point, a line, and a plane?. Think of a football field. The players are the points, yard lines, and the field is the plane. Chapter 1-1 (Identifying Points, Lines, & Planes).

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Chapter 1-1 (Identifying Points, Lines, & Planes)

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  1. Chapter 1-1 (Identifying Points, Lines, & Planes) • What is the difference between a point, a line, and a plane? • Think of a football field. The players are the points, yard lines, and the field is the plane.

  2. Chapter 1-1 (Identifying Points, Lines, & Planes) • Point: No dimension. Represented by a dot. • Line: One dimension. Never ends, keeps going in both directions. ( ) Use 2 points to name a line. • Plane: 2 dimensions. Represented by a parallelogram, but does not end. Named by 3 points.

  3. Chapter 1-1 (Identifying Points, Lines, & Planes) • Example: • Collinear Points • Coplanar Points • Identify the lines, points, and plane in the figure given. Q m V T R S P n

  4. Chapter 1-1 (Identifying Points, Lines, & Planes) • Segments & Rays • Line Segment: Has 2 endpoints. Written as AB • Ray: Has one endpoint, then continues to go the other direction. Written CD B A D C

  5. Chapter 1-1 (Identifying Points, Lines, & Planes) • Examples • Give another name for GH • Name all rays with endpoint J • Are HJ and JH the same ray? • HJ and HG? E G J H F

  6. Chapter 1-1 (Identifying Points, Lines, & Planes) • Intersection • Where geometric figures have one or more points in common.

  7. Chapter 1-1 (Identifying Points, Lines, & Planes) • Examples • Name the intersection of MX and line a • Name the intersection of plane C and plane D

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