Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 12 - Review - Page 443: 3

Answer

the measure of 2 is $121^o$. the measure of 1 is $ 59^o$. the measure of 3 is $59^o$. the measure of 4 is $59^o$.

Work Step by Step

Since angles 5 and 2 are exterior alternate, then they are equal. That is, the measure of 2 is $121^o$. Since angles 1 and 2 are supplementary, then the measure of angle 1 is $180-121=59^o$. Since angles 1 and 3 are vertical, then they are equal. That is, the measure of angle 3 is $ 59^o$. Since angles 3 and 4 are interior alternate, then they are equal. That is, the measure of angle 4 is $59^o$.
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