Understanding Points, 1-1 Lines, and Planes Warm Up

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Presentation transcript:

Understanding Points, 1-1 Lines, and Planes Warm Up Holt Geometry Warm Up Lesson Presentation Lesson Quiz Holt McDougal Geometry

Warm Up 1. x ≥ 3 2. 2 ≤ x ≤ 6 3. x < 1 OR x > 0 Graph each inequality. 1. x ≥ 3 2. 2 ≤ x ≤ 6 3. x < 1 OR x > 0 -2 2 4 2 4 6 1

What’s the Point of Geometry? Euclid Biography 1:30 What’s the Point of Geometry? 3:19

Objectives Identify, name, and draw points, lines, segments, and planes.

Vocabulary point line plane collinear coplanar line segment

Example 1: Naming Points, Lines, and Planes A. Name four coplanar points. A, B, C, D B. Name three lines. Possible answer: AE, BE, CE

Example 3B Name a plane that contains three noncollinear points. Possible answer: plane GHF

Example 4A: Representing Intersections A. Sketch two lines intersecting in exactly one point. B. Sketch a figure that shows a line that lies in a plane.

Example 4B Sketch a figure that shows two lines intersect in one point in a plane, but only one of the lines lies in the plane.

Lesson Quiz 1. A point on BC. Possible answer: D 2. The intersection of plane N and plane T. Possible answer: BD 3. A plane containing E, D, and B. Plane T

Lesson Quiz Draw the following. 1. a line intersecting a plane at one point

Homework Finish handout, then p. 9-11 #13-16, 31-34, 39-40