Answers 2627 GEOMETRY A Lesson 1.5: Linear Pairs and Vertical AnglesQuestion 4

4

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Lesson 1.5: Linear Pairs and Vertical Angles

Question 4 • 26/27 GEOMETRY A

Given: mADE = 60° and mCDF = (3x + 15)°Prove: x = 15

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Answer

A

Statement: 60 = 3x + 15; Reason: substitution

B

Statement: x = 15; Reason: subtraction property of equality

C

Statement: 60 = 3x + 15; Reason: transitive property

D

Statement: x = 15; Reason: subtraction and division properties of equality

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