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 30: 38f

Answer

There is one plane determined by points A, C, and H.

Work Step by Step

Through any three non-collinear points there is one plane. OR. Using the tissue box visual from part (a); the plane defined by points A, C, and H would be one of the planes that 'slices through' the tissue box, cutting a little pyramid portion off of the tissue box.
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