Warm Up Draw one of the following

Warm Up: Draw one of the following … - A fancy house. - Your favorite animal. - A self portrait

7 -1 Points, Lines, and Planes Learn to describe figures by using the terms of geometry. Course 1

7 -1 Points, Lesson and Planes Insert Lines, Title Here Vocabulary point line plane line segment ray Course 1

7 -1 Points, Lines, and Planes The building blocks of geometry are points, lines, and planes. A point is an exact location. P point P, P A point is named by a capital letter. A line is a straight path that extends without end in opposite directions. A B line AB, line BA, BA A line is named by two points on the line. A plane is a flat surface that extends without end in all directions. L M N plane LMN, plane MLN, plane NLM A plane is named by three points on the plane that are not on the same line. Course 1

7 -1 Points, Lines, and Planes Additional Example 1 A &1 B: Identifying Points, Lines, and Planes Use the diagram to name each geometric figure. A. three points M, N, and P Five points are labeled: points M, N, P, Q, and R. B. two lines PR and NR You can also write RP and RN. Course 1 Q R N P M

7 -1 Points, Lines, and Planes Additional Example 1 C & 1 D: Identifying Points, Lines, and Planes Use the diagram to name each geometric figure. C. a point shared by two lines point R Point R is a point on PR and NR. R D. a plane QRM Use any three points in the plane that are not on the same line. Write three points in any order. Course 1 Q N P M

7 -1 Points, Lines, and Planes Try This: Example 1 A &1 B Use the diagram to name each geometric figure. A. three points S, T, and U Five points are labeled: points S, T, U, V, and W. B. two lines UW and SW You can also write WU and WS. Course 1 W V S T U

7 -1 Points, Lines, and Planes Try This: Example 1 C & 1 D Use the diagram to name each geometric figure. C. a point shared by two lines point W Point W is a point on WS and WU. D. a plane VUT Use any three points in the plane that are not on the same line. Write three points in any order. Course 1 W V S T U

7 -1 Points, Lines, and Planes A line segment is a made of two endpoints and all the points between the endpoints. X Y line segment XY, line segment YX, YX A line segment is named by its endpoints. A ray has one endpoint. From the endpoint, the ray extends without end in one direction only. J K ray JK, JK A ray is named by its endpoint first followed by another point on the ray. Course 1

7 -1 Points, Lines, and Planes Additional Example 2 A & 2 B: Identifying Line Segments and Rays Use the diagram to give a possible name to each figure. A. three different line segments AB, BC, and AC You can also write BA, CB, and CA. A B B. three ways to name the line AB, BC, and AC You can also write BA, CB, and CA. Course 1 C

7 -1 Points, Lines, and Planes Additional Example 2 C & 2 D: Identifying Line Segments and Rays Use the diagram to give a possible name to each figure. C. six different rays AB, AC, BC, CB, A CA, and BA B D. another name for ray AB AC A is still the endpoint. C is another point on the ray. Course 1 C

7 -1 Points, Lines, and Planes Try This: Example 2 A & 2 B Use the diagram to give a possible name to each figure. A. three different line segments DE, EF, and DF You can also write ED, FE, and FD. D B. three ways to name the line DE, EF, and DF You can also write ED, FE, and FD. Course 1 E F

7 -1 Points, Lines, and Planes Try This: Example 2 C & 2 D Use the diagram to give a possible name to each figure. C. six different rays DE, EF, DF, FE, D FD, and ED D. another name for ray DE DF D is still the endpoint. F is another point on the ray. Course 1 E F

7 -1 Points, Lesson and Planes Insert Lines, Title Here Lesson Quiz Use the diagram to name each geometric figure. 1. three points Possible answer: A, B, C 2. two lines Possible answer: AD, CE 3. a point shared by a line and a ray Possible answer: F 4. a plane Possible answer: plane AEC Course 1