I am having trouble with this problem how do i solve it.

Answer:
90
Step-by-step explanation:
I do not know if this is true or not but i am pretty sure this is perimeter
All triangles sides have to add up to 180
1. add up 25 and 65
2. 180-90=90
Then i think your answer is 90
Please do not give me hate if i did this wrong