# Points, Lines, and Planes - PowerPoint PPT Presentation

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Shade the plane that contains X , Y , and Z. Points X , Y , and Z are the vertices of one of the four triangular faces of the pyramid. To shade the plane, shade the interior of the triangle formed by X , Y , and Z. Points, Lines, and Planes. HE. Points, Lines, and Planes.

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Points, Lines, and Planes

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#### Presentation Transcript

contains X, Y, and Z.

Points X, Y, and Z are the vertices of one of the

four triangular faces of the pyramid. To shade

the plane, shade the interior of the triangle

formed by X, Y, and Z.

HE

### Points, Lines, and Planes

Use the diagram at right.

1. Name three collinear points.

2. Name two different planes that contain points C and G.

3. Name the intersection of plane AED and plane HEG.

4. How many planes contain the points A, F, and H?

5. Show that this conjecture is false by finding one counterexample: Two planes always intersect in exactly one line.

D, J, and H

planes BCGF and CGHD

1

Sample: Planes AEHD and BFGC never intersect.

### Points, Lines, and Planes

As you look at the cube, the front face is on which plane?

The back face is on which plane?

The left face is on which plane?

The back and left faces of the cube intersect at?

Planes HGC and AED intersect vertically at?

What is the intersection of plane HGC and plane AED?

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