Next O Mathematical Proofs: Mastery Test
Select the correct answer torm eacn arop-down menu.
Given: m/AOB = 42°
m/EOF= 66°
Prove: m/COD = 72°
A
B
Complete the proof.
It is given that m/AOB 42° and mZEOF= 66°. By the
m/BOC 66. By the
m/AOC + m/COD
180°. After application of the
subtraction property of equality
angle addition postulate
linear pair theorem
vertical angles theorem
m/AOC 108, and by the
ZEOF ZBOC. Therefore,
✓m/COD
= 72.
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