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Title of section
Geometry
Points, Lines and
Planes
Geometry
Points, Lines and
Planes
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Points, Lines and Planes
are considered to be
undefined.
May 610:23 AM Descriptions of Point,Point LineLine and PlanePlane A location No size A small dot A series of points Extends in two opposite directions A flat surface Contains many lines Named with a capital letter Named with a lowercase letter Contains infinitely many points Pin page and use dual screen to drag descriptions to point, line and plane pages... Descriptions of points lines and planes Point Named with a capital letter A location No size A small dot
Descriptions of points lines and planes Line Named with a lowercase letter Extends in two opposite directions Contains infinitely many points A series of points Descriptions of points lines and planes Plane Named with a capital letter Contains infinitely many points A flat surface Contains many lines interactive descriptions name the shape
A
B
C
m
D
E F
P
Name the shapes
Postulate 13 Postulate 13 If two planes intersect, then they intersect in exactly one line. Postulate 14 Postulate 14 Through any three noncollinear points there is exactly one plane. A (^) B C (^) D F E H G collinear interactive Are the three points collinear? G (^) A B (^) C (^) D E F sometimes, always never Use sometimes, always or never to fill in the blanks. sometimes always never
- Intersecting lines are __________ coplanar.
- Two planes ___________intersect in exactly one point.
- Three points are __________ coplanar.
- Four points are ______________ coplanar. CheckCheck
Draw if possible Draw, if possible... Four collinear points Two noncollinear points Three noncollinear points Three noncoplanar points Student response system
Closure
Grade: 1012 Subject: Geometry Date: (^)? 3 undefined terms 1 The three undefined terms are A point, line, space B point, line, plane C point, plane, space D line, point, space set of all points 2 The set of all points is called A line B plane C space D axiom
