Step-by-step explanation:
the question answer a should be 
 
        
             
        
        
        
Answer: Square
Step-by-step explanation:
A cross section cut parallel to a base will be the same shape as the base itself, and the base of a cube is a square. :)
 
        
             
        
        
        
Answer:
20, thats what is in your little box so that should be the answer
 
        
                    
             
        
        
        
Answer:
The area of the given triangle ABC is 10 units.
Step-by-step explanation:
we have the area of the triangle when points are given is given by the relation
Area of triangle= 

and hence putting the Value 
triangle = 1/2*( -2*(-2+2)+2*(-2-3)+(-2)*(3+2))
 = 1/2*(0+2*(-5)+(-2)*5)
 = 1/2*(-10-10)
 = 1/2*(-20)
 = (-10) units
Since area of the triangle is always positive, we neglect the minus sign and take 10 units as its area.