Warm-up Spend 5 minutes studying for your rules quiz along with looking over your notes from Section 1.1 Objective 1: Check for understanding of rules.

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Presentation transcript:

Warm-up Spend 5 minutes studying for your rules quiz along with looking over your notes from Section 1.1 Objective 1: Check for understanding of rules and section 1.1

Rules Quiz Turn the quiz in when you are finished, make sure to answer all of the questions on the front and back of the quiz

Homework Check

Geometry: Chapter 1 1.2 Points, Lines, and Planes Objective 2: Able to accurately label and define points, lines and planes

Are ideas but do NOT have definition Undefined Terms Point, line, and plane Are ideas but do NOT have definition Used in definitions of other terms

Naming a Point: use one capital Letter Undefined Terms Point: a dot, NO SIZE Naming a Point: use one capital Letter Ex: Name ______

Line: extends forever in 2 directions, NO THICKNESS Undefined Terms Line: extends forever in 2 directions, NO THICKNESS Naming a line (2 ways) Any 2 points on the line with a over the top A single lowercase letter Ex:

Plane: Extends infinitely in all directions along a flat surface Undefined Terms Plane: Extends infinitely in all directions along a flat surface Naming a Plane: (2 ways) Name 3 points on the plane One script capital letter Ex:

Warm-up 9/10 There are 9 points total. There are two intersections of lines Some people dream of success... While others wake up and work hard at it.  ~Author Unknown

Objective TLW be able to identify and label points, lines, and planes. TLW define and describe postulate, collinear, and coplanar

Postulate: statements that are accepted true without further justification

Postulate: Two points Determine a line Through any 2 pts there is exactly one _____________ Postulate: Three points determine a Plane Through any 3 points not on a line there is exactly one ________

Examples: Use the figure at the right to: 1) Name 3 points _________ 2) Name 2 lines __________ 3) Name 2 planes _________

Other Terms Collinear: When points can be contained in a single line Ex: YES Are the first 3 points collinear? Second 3? NO

Coplanar: When points are contained in a single plane Note: 3 points will always be coplanar

Examples: Use the diagram at the right to: 1) Name 3 pts that are collinear 2) Name 4 pts that are coplanar 3) Name 3 pts that are NOT collinear G H F E D

Warm-up 9/11 Define postulate, collinear, and coplanar. Provide a counterexample to the statement, ‘the grass is green, then it rained’ Patriotism is easy to understand in America. It means looking out for yourself by looking out for your country. -- Calvin Coolidge

Objective TLW define, label, and name rays and segments

Segments: Naming a segment: Ex: A part of a line that begins at one point and ends at another. Give the endpoints with over the top

Endpoint Endpoint: The points at the ends of a segment

Ray Ray: Naming a Ray: EX: A part of a line that starts at a point (an endpoint) and extends infinitely in one direction. State endpoint first, then another point on ray with on top L A B S K

Drawing Lines, Segments, and Rays Draw three noncollinear points J, K, L. Then draw JK, KL and L J. SOLUTION K L J Draw J, K, and L 1 2 Draw JK. 3 Draw KL. 4 Draw LJ.

Practice A B C 2 D E F G

Practice On your own complete the worksheet

Guided Practice