Question 1190733
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Angles 1 and 2 are complementary
This means they add to 90
(angle1)+(angle2) = 90


Because angles 2 and 3 are congruent, this means they are the same. We can replace "angle2" with "angle3" through the substitution rule.


We go from this
(angle1)+(angle2) = 90
to this
(angle1)+(angle3) = 90
which shows that angles 1 and 3 are complementary.
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