Geometry Lesson 1 1 Points Lines and Planes
- Slides: 17
Geometry Lesson 1. 1 Points, Lines, and Planes Essential Question: What are the undefined and defined terms used in Geometry?
Goals: • Understand use the basic undefined terms and defined termsof geometry. • Sketch the intersection of lines and planes. Geometry 1. 1 Points, Lines and Planes 11 February 2022 2
What are these terms? Defined Terms Undefined Terms • • Point Line Plane Betweeness Geometry 1. 1 Points, Lines and Planes • • • Collinear Points Coplanar Points Line Segment Ray Opposite Rays Coplanar 11 February 2022 3
Reading Math To be successful in any math class, you must learn to read the text book. A math book is not just a book of problems. Geometry 1. 1 Points, Lines and Planes 11 February 2022 4
Reading Math Why do you need this skill? • To understand homework directions. • To study examples when you get stuck. • To get caught up when you miss school. Geometry 1. 1 Points, Lines and Planes 11 February 2022 5
Geometry 1. 1 Points, Lines and Planes 11 February 2022 6
Geometry 1. 1 Points, Lines and Planes 11 February 2022 7
Collinear Points are points that lie on the same line. Coplanar Points are points that lie on the same plane. Intersections: Geometry 1. 1 Points, Lines and Planes 11 February 2022 8
Sample Problem 1 L N M O P a. Name four coplanar points. L, M, N, O b. Name four points that L, M, are N, not P or M, N, O, P or N, O, L, P or coplanar. L, N, O P, O, M, L 11 February Geometry 1. 1 Points, collinear Lines and Planes c. Name three 2022 points. 9
Important Terms to Know A B R S Line AB AB endpoints RS Segment RS Line BA BA Segment SR SR Lines may also be named with a single letter: l Geometry 1. 1 Points, Lines and Planes 11 February 2022 10
Rays P M Ray MP or MP Initial Point The initial point is always first! NOT Ray PM or PM! Geometry 1. 1 Points, Lines and Planes 11 February 2022 11
Same Ray, Different Name AB and AC are the same ray! A Geometry 1. 1 Points, Lines and Planes C B They have the same initial point, and B and C are 11 collinear. February 2022 12
Sample Problem 2 Draw three collinear points A, B, and C. Draw point D which is not collinear with A, B, and C. Draw AB and BD. D A B Geometry 1. 1 Points, Lines and Planes C 11 February 2022 13
Opposite Rays A C B CA and CB are Opposite Rays are collinear. Geometry 1. 1 Points, Lines and Planes 11 February 2022 14
Are these opposite rays? No! They are not collinear. Geometry 1. 1 Points, Lines and Planes 11 February 2022 15
Sample Problem 3 Name two pairs of opposite rays. E F G H Possible Answers: Geometry 1. 1 Points, Lines and Planes 11 February 2022 16
Sample Problem 4 Sketch one plane with a line in the plane that intersects a line not in the plane. Geometry 1. 1 Points, Lines and Planes Use the dotted line to indicate this part of the line is behind 11 the plane. February 2022 17
- Lesson 1-1 basic geometric figures
- Lesson 1-1 basic geometric figures
- Lesson 1-2 points lines and planes
- 1-2 points lines and planes answer key geometry
- Name the intersection of line qz and segment wu
- Lesson 1-1 points, lines, and planes answers
- Understanding points lines and planes
- Understanding points lines and planes
- Plane abc
- 1-1 understanding points lines and planes
- Understanding points lines and planes
- How many planes appear in the figure?
- Postulate 1-5
- Name
- Understanding points lines and planes
- Example of opposite rays
- Quiz 1-1 points lines planes distance and midpoint
- Coplanar points