9cm 
Imagine there are 2 triangles solve for one 3*3=9\2=4.5
Then add 
4.5+4.5=9
        
             
        
        
        
Well it depends if it's a leap year. If it isn't a leap year there are 28 days and if we are in a leap year than there are 29 days in February.
Hope that helped :)
        
             
        
        
        
Answer:
96 sq yards
Step-by-step explanation:
40-24 is 16, and 16/2 is 8. 8 is the second length, so 8 times 12 is 96 which is the area 
 
        
             
        
        
        
That is an isosceles right triangle.  (Also known as a 45 45 90 triangle).