Answer:
i believe the first one
Step-by-step explanation:
Answer:

Step-by-step explanation:
From the isosceles-base theorem, the measure of the angles adjacent to the pair of congruent sides of the triangle are equal. Since the problem declares
, the remaining unknown angles are equal (
). The sum of the interior angles of a triangle always add up to
.
Therefore:
.
Answer:
(3a-7) (2a-1) is the answer
Step-by-step explanation: