Download GEOMETRY PROOF PRACTICE ANSWER KEY

GEOMETRY PROOF PRACTICE ANSWER KEY
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substitution
linear pair postulate
transitive
linear pair postulate
addition prop of equality
multiplication prop of equality
vertical angle congruence thm
division prop of equality
subtraction prop of equality
symmetric
reflexive
1. AB = DE
1. given
2. addition
3. segment addition
4. AD = BE
4. substitution
13.
1. PR = ½ PT
2.
1. given
2. multiplication
4. segment addition
5. substitution
6. subtraction
7. R is midpoint of PT
14. 1. m<1 = m<3
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4. m<AFC =m<DFB 4.
15.
given
addition
angle addition
substitution (transitive)
1. m<1  m<2;m<1=120;
5. m<3 = 120
16. 1. VX = XZ
1. given
2. vertical angle congruence thm
3. transitive
4. Def congruent angle
5. substitution
1. given
2. segment addition
3. substitution
4. XZ = VW + WX 4. symmetric
17.
1. given
2.linear pair postulate
18. < 1 & < 2 are vertical angles
6. <2 & <3 are supplementary
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given
vertical angle congruence thm
given
linear pair postulate
substitution
definition supplementary angles