Find x so that the triangle with vertices A=(7, −9, −7), B=(15, −18, x), and C=(9, −8, 2) has a right angle at A.

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter2: Functions And Graphs
Section2.2: The Rectangular Coordinate System And Graphing Lines
Problem 91E
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Find x so that the triangle with vertices A=(7, −9, −7), B=(15, −18, x), and C=(9, −8, 2) has a right angle at A.

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