Points lines planes angles.pptx

# Points lines planes angles.pptx - Spatial Thinking Points...

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Spatial Thinking Points, lines, planes, angles

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Points and lines A point is an exact location in space Has no dimension Labelled point A, point B etc A line is a collection of points in a straight path that extends infinitely Has only one dimension: length Labelled as line AB or AB
Lines and planes A line segment is part of a line Has two endpoints Has fixed length Labelled as line segment AB or AB A plane is a collection of points that form a flat surface that extends infinitely in all directions Need at least 3 points to label a plane Plane ABC

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Class exercise Draw XY Draw CD Discuss with your neighbour what infinitely means to you when we say a line “extends infinitely in both directions” or that a plane “extends infinitely”
Relationship between points and lines If you have a point and a line The point is either on the line, or not If you have two distinct points

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