If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent (Angle-Side-Angle or ASA).
The possible side length combinations would be 1 and 39 or 3 and 13.
1 and 39: the perimeter of these two would be 80.
3 and 13: the perimeter of these two would be 32.
The answer is 32.
I believe you multiply 2 times everything in parenthesis. 2 times x is 2x. 2 times 4 is 8. so that would be 2x + 8.
Dear Jen721, the answer to your problem is 2 2/3.
