Answer:
 18.85 mm.
 7.73 mm^2.
Step-by-step explanation:
The side of the square =  sqrt 36 = 6 mm.
Now this side = the diameter of the circle.
So the circumference of the circle = π  * 6 =  18.85 mm.
The answer to the second part 
= area of the square - area of the circle
= 36 -  π *3^2
= 36 - 28.27
= 7.73 mm^2.
 
        
             
        
        
        
Too fuzzy! I can’t see it when I try to read
        
             
        
        
        
area is 36...............
 
        
             
        
        
        
        
Answer:
30.96 m²
Step-by-step explanation:
In white there are four parts of a circle, so we can split the 12 m in half to show the radius, and then solve to find the area of the full circle.
A = r²
a = (6)²
a = (36)
a = 113.04
Then you find the area of the whole box.
12 x 12 = 144
Then you subtract the area of the circle in white from the area of the whole box.
144 - 113.04 = 30.96 m²
So that’s the area of the shaded region.