Answer: Option 3. Angle congruence postulate
Solution:
If two angles are equal (Step 6. m<A=m<B), they are congruent
Answer: The reason for statement 7 is Definition of congruent angles.
Step-by-step explanation:
The given question is asking us to prove <A and <B are congruent.
<A&<B are given as supplementary angles and <A measure is given as 90 degrees.
By substitution property of Equality m<A=m<B.
From definition of congruent angles that is Congruent Angles have the same angle
we can say <A≅<B.
