Chapter 1: Q12 (page 24)
State a postulate, or part of a postulate, that justifies your answer to each exercise.

Does plane N contain any points not on ?
Short Answer
Yes, plane N contains any points not on .
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Chapter 1: Q12 (page 24)
State a postulate, or part of a postulate, that justifies your answer to each exercise.

Does plane N contain any points not on ?
Yes, plane N contains any points not on .
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Sketch and label the figures described. Use dashes for hidden parts.
A vertical plane intersects two horizontal planes in lines I and n.
In diagrams a, b, c, and d are lengths. Which is greater, the product ab or the product cd?

What kind of angle is ?

Theorem 1-1 states that two lines intersect at exactly one point. The diagram suggests what would happen if you tried to show two 鈥渓ines鈥 drawn through two points. State the postulate that makes this situation impossible.

State whether it is possible for the figure described to exist. Write yes or no.
Three non-collinear points all lie in each of the two planes.
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