points, lines, and planes - sausd
TRANSCRIPT
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Points, Lines, and Planes
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Point
• a dot
• no size
• only location
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Line • a straight line that goes on forever in both
directions
• can use any 2 points to name a line
• symbolized by
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Collinear• points on the same line
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Plane• a flat surface
• no thickness
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Coplanar• points that are on the same plane
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WHAT ARE THE UNDEFINED TERMS IN GEOMETRY?
point
line
plane
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line segment• line that has endpoints (does not go on
forever
• symbolized by
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Intersection of 2 Lines
• Is always a point
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Intersection of two Planes
• Is always a line
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Ray
•has 1 endpoint
•symbolized by
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Opposite Rays
• two rays that have the same endpoint and go in opposite directions
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Summary
• What does collinear mean?
• What does coplanar mean?
• What are the symbols for line, ray, and line segment?