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Published byRachel Duncan
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Warm-ups P no calculators These problems are due in 3 min.
Date Sec 1-1 Concept: Identify Points, Lines and Planes Objectives: Given basic concepts in Geometry, name and sketch geometric figures
3-Undefined Terms in GeometryPoint Line Plane
A Point It has no dimension. It is usually represented by a small dotUndefined. A Label with Capital Letters
Line Extends in one dimension. Usually represented by a straight line with arrows on the ends. Undefined A B l Labels: AB BA l
Plane: undefined Extends in two dimensions. Usually represented by a shape that looks like a table top. A B C M Plane M or plane ABC
Key Terms – you probably already know some of these…Coplanar and Noncoplanar Collinear and Noncollinear Ray Segment Opposite ray Intersect
Collinear: points that lie on the same line P I G SPoints P, I, G, and S are collinear
Non-Collinear: Points that do not lie on the same line O G DPoints D, O and G are noncollinear
Coplanar: Points that lie in the same plane G M A S H TPoints M, A, T, H, S are coplanar
Non -Coplanar: Points that do not lie in the same plane G A M S H TPoints G, S and H are non- coplanar
Line Segment: Part of a line that consists of 2 endpoints A B AB or BA
Ray: Part of a line that consists of a point called the initial point and all points on the line that extend in one direction. A B A is the initial point AB
Opposite Rays: If C is between A and B, then CA and CB are opposite rays B C A
Intersect: To have one or more points in commonIntersection: The set of points that two or more geometric figures have in common
Example 1: L C N M P O 1. Name 3 coplanar points2. Name 3 collinear points 3. Name 3 non-collinear points 4. Name a line segment in two different ways 5. Name a ray
Example 1: Cont. L C N M P O 6. Name a line in 2 ways 7. Name a point8. Name the plane in two ways 9. What is the intersection of LO and plane C
Example 2: Sketch the figure describedA. A line and a plane that do not intersect
B. 2 planes that do not intersect and a line that intersects each plane in 1 point
Example 3: Determine if the point lies on the lineA. Y = x-4 A(5,1) 1 = 5-4 1=1 YES, it lies on the line B. Y = 2x + 3 A(7, 16) 16 = 2(7) + 3 16 ≠ 17 NO, It doesn’t lie on the line
Example 4: Graph the inequality on the number lineExample 4: Graph the inequality on the number line. Tell whether the graph is a segment, a ray or rays, a point or a line X>2 or x<5 2 5 Line
Example 5: What kind of Geometric Intersection does the photograph suggest?The intersection of 2 lines The intersection of a line and a plane
Today’s Work: In Class: Homework:
Geometry Sections 1.2 & 2.1 The Building Blocks of Geometry
Definitions Goals Understand and use the basic undefined and defined terms in geometry Sketch the intersection of lines and planes Academic Geometry:
1.1Points, Lies, and Planes Warm Up Simplify Each Expression.
1.1 Identify Points, Lines and Planes
1.2 Points, Lines, and Planes
Basic Geometry Concepts
1.2 Points, Lines, and Planes 9/10/12
Basics of Geometry POINTS! LINES! PLANES!.
Points, Lines, and Planes
Lesson 1.2 Intro to Geometry.
CHAPTER Understanding points, lines and planes
Warm - Up Please get our your homework and start these problems on a piece of loose leaf paper. Graph each of these ordered pairs. 1.) (-2, 1) 2.) (4,
• A point has no dimension. It is usually represented by a small dot.
Understanding Points, 1-1 Lines, and Planes Warm Up
What’s on the Menu Today?
1.2 Points, Lines and Planes
1.1 Points, Lines and Planes
Section 1.1 Undefined Terms: Point, Line, and Plane Point - Line - Plane -
Section 1.1. Warm Up Graph each inequality. 1. x ≥ ≤ x ≤ 6 3. x 0.
1-2 Points, Lines, and Planes
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