It would be -15 I think just calculate it to make sure xx
        
             
        
        
        
Answer:
210 cm sq
Step-by-step explanation:
Area of a triangle is 1/2bh.
12 cm and 35 cm would be both sides of the triangle, not 37 cm because it is the hypotenuse (largest side).
1/2*12*35=210 cm sq
 
        
             
        
        
        
50% 
i think
tell me if i got it right...
        
             
        
        
        
Using algebra...
n and n+2 are the integers
n*(n+2)=288
n^2+2n=288
n^2+2n-288=0
288=2*2*2*2*2*3*3=(2*2*2*2)*(2*3*3)=16*18 and 18-16=2
factor
(n+18)(n-16)=0
n+18=0
n=-18
n+2=-16
this is one solution
n-16=0
n=16
n+2=18
this is another solution
as you can see, it's just a matter of factoring 
288
using arithmetic...
√288=16.97≈17
16 and 18 are the integers (as well as -16 and -18)
        
             
        
        
        
True. If the angle is straight it must be 180 degrees, then it's just a line