Geometry: Common Core (15th Edition)

Published by Prentice Hall

Chapter 1 - Tools of Geometry - 1-5 Exploring Angle Pairs - Lesson Check - Page 37: 6

Answer

x=15, because the angles are complementary.

Work Step by Step

The diagram shows complementary angles, but the calculation shows supplementary angles. The calculation should be: $4x+2x=90$ $6x=90$ $x=15$

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