Answer:
(B)All right angles are congruent
Step-by-step explanation:
Given that:

The reason for this congruency is that both are right angles and in fact, all right angles are congruent.
we are given

Firstly , we will multiply both sides by 5

now, we can simplify it


now, we can solve for n
.............Answer
Answer: 15
Step by step explanation:
9n = 81 <-- equation
n = 81/9
n = 9 <-- answer to equation
hope this helps and have a great day :)
1/3 because 2/6 divided 2/2 equals 1/3