Choose the congruence theorem that you would use to prove the triangles congruent sss
sas
asa
aas

You would use ASA.

Step-by-step explanation:

ASA, or angle-side-angle, is used when you know that one line and the two angles coming off of it are congruent to the corresponding line and angles in the other triangle.  In the image, the angles and the line between them are marked as congruent.  Thus, we can use ASA to determine their congruence.

answer: 12,000

step-by-step explanation: first you ar e supposed to add. then multiply then subtract