Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 1 - Section 1.3 - Early Definitions and Postulates - Exercises - Page 29: 26d

Answer

One plane.

Work Step by Step

Through any three non-collinear points lies one plane. Again you are given four points. Since the four points lie on two different lines you can chose two points from one line and a third point from the other line, creating your three non-collinear points.
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