Lesson 1.1Points, Lines and Planes
Objective:
•To identify and label basic geometric figures: (Point, Line and Plane).
POINT
•DEFINITION:▫Defines a location▫Has no dimension
•VISUAL REPRESENTATION▫A dot:
•HOW TO LABEL:▫Usually with a capital letter.
POINT REAL LIFE EXAMPLES
LINES
•DEFINITION▫Has one dimension
•VISUAL REPRESENTATION▫Line with two arrow heads
•HOW TO LABEL ▫Use two points to label: ▫AB, GH
LINESIN REAL LIFE
PLANE
•DEFINITION:▫Has two dimensions
•VISUAL REPRESENTATION
•HOW TO LABEL:▫Use three points (not on the same line)
PLANESIN REAL LIFE
COLLINEAR
•DEFINITION:▫Points that lie on the same line
•VISUAL REPRESENTATION
•HOW TO LABEL:▫No label
COPLANAR
•DEFINITION:▫Points that lie on the same plane.
•VISUAL REPRESENTATION
•HOW TO LABEL:▫No label
SEGMENT•DEFINITION:
▫A line with end points.
•VISUAL REPRESENTATION
•HOW TO LABEL:▫AB, PQ
RAY
•DEFINITION:▫Consists of all points that lie on the same
side of two different points.•VISUAL REPRESENTATION
•HOW TO LABEL:▫AB
INTERSECTION
•DEFINITION:▫To figures intersect if they have one or
more points in common.•VISUAL REPRESENTATION
•HOW TO LABEL:▫No label
WHAT GEOMETRIC CONCEPTS DO YOU SEE IN THIS PICTURE?
WHAT GEOMETRIC CONCEPTS DO YOU SEE IN THIS PICTURE?
WHAT GEOMETRIC CONCEPTS DO YOU SEE IN THIS PICTURE?
GUIDED PRACTICE
1. Give two other names for PT.
2. Give two other names for plane R
GUIDED PRACTICE
TRUE OR FALSE:1. Points S, P and T are collinear.
2. Points V, P AND T are coplanar.
3. Point Q is coplanar with V, P and T.
3. The intersection of Plane R and line n is line m.
CHECK POINT
•DRAW THREE NONCOLINEAR POINTS X, Y AND Z. DRAW LINE SEGMENT XZ. DRAW POINT A BETWEEN XZ AND DRAW RAY AY.
INDEPENDENT PRACTICE
GEOMETRY TEXTBOOK, PAGE 5
PROBLEMS: 3, 4, 5, 6, 8, 10, 25 & 26.
HOMEWORK
•WORKBOOK, PAGE 1.PROBLEMS: 1-12.