Answer:
See below.
Step-by-step explanation:
From the given info the 2 triangles are isosceles with AE = FR and ET = RP because the 2 sets of base angles are equal.
As the base angles are congruent m < E = m < R.
So the are 2 triangles are congruent by SAS, ASA and AAS.
The answer is Vertical angles are equal.
Answer:

Step-by-step explanation:
First simplify the equation.
Now multiply both sides by 3.
I hope it helps you. Please choose my answer as the BRAINLIEST.