Chapter 1: Q20 (page 21)
Without measuring, sketch each angle. Then use a protractor to check your accuracy.
angle
Short Answer
The angle without measuring is

With a protractor, the angle will be near .
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Chapter 1: Q20 (page 21)
Without measuring, sketch each angle. Then use a protractor to check your accuracy.
angle
The angle without measuring is

With a protractor, the angle will be near .
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Sketch and label the figures described. Use dashes for hidden parts.
Point P is not in plane N. Three lines through point P intersect N in points A, B, and C.
Follow the steps shown to draw the figure named.
A rectangular solid or box.

Suppose you were asked to find a point 5 cm from P, 5 cm from F, and 5 cm from T. Is there such a point?

The plane that contains the top of the box can be called plane ABCD.
Name the intersection of planes ABFE and BCGF.

You can think of the ceiling and floor or a room as parts of horizontal planes. The walls are parts of vertical planes. Vertical planes are represented by figures like those shown in which two sides are vertical. A horizontal plane is represented by a figure like that shown, with two sides horizontal and no sides vertical.

Can two horizontal planes intersect?
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