Answer:
1.) A diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle.
2.) 8
3.) 201 square inches 
Step-by-step explanation:
 
        
             
        
        
        
The answer is commutative property 
        
                    
             
        
        
        
Answer:
80
Step-by-step explanation:
add
 
        
             
        
        
        
x = 85 degrees and
y = 45 degrees.
Step-by-step explanation:
Step 1:
The angle for a straight line is 180°. The sum of the angles in a triangle is 180°. These two statements are required to solve this problem.
The angles of x° and 95° are on a single straight line.
So 

So the angle of x is 85°.
Step 2:
The sum of the angles in a triangle is 180°.
So 


So the angle of y is 45°.