20
U have to divide it by 3 the ratio is 1:3
 
        
             
        
        
        
X=4
This is because
(4)3-2=10
12-2=10
10=10
This makes the statement true!
Hope this helps have a good day!
        
             
        
        
        
Equilateral means that the 3 sides are equal length. For this to happen, the triangle needs to also have 3 equal angles, but it is mentionned that it has an obtus angle, therefore, not all angles are the same, meaning the 3 sides also aren't equivalent.
the triangle isn't equilateral
        
             
        
        
        
Answer:
3.5 yr
Step-by-step explanation:
np ;)