Hey guys! a friend and I are confused and could really use the help. could you explain why? thanks!
2 answers:
Answers:
- substitution
- definition of perpendicular
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Explanation:
The first dropdown box is "substitution" because we are replacing, aka substituting, the with
. This replacement is valid because we are given that
. They are congruent angles.
The second dropdown box is "definition of perpendicular". If we have a 90 degree angle like this, then the two lines are considered perpendicular simply by definition.
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