Ok first you have to multiply and get scammed
        
             
        
        
        
(9-15)/(-2+4)= -6/2 = -3
-3 is the slope
        
             
        
        
        
so obviously first of all find three sherical objects or balls of varioius sizes to make it easier get a large medium and small sized. 
then on scratch paper sketch those objects (im assuming by the looks of it you would trace them if not just draw them then take measuring tape or a ruler across to measure said object) now you arent told what units to measure in but id assume to stick with one unit either inches or cm
mesure the length across which is the circumference
now you would just have to do your calculations by finding the radius and volume and surface area
remember volume is (*units) cubed and suface area is (*units) sqared
 
        
             
        
        
        
You had the right idea using the Pythagorean theorem to solve for b. 
Problem is for that triangle to work, the 5 and the 2√2 would have to switch places. The length of a leg cannot be larger than the length of the hypotenuse for it to truly be a right triangle. 
Pythagorean theorem only works for the right triangles. Only way to "solve this problem would be to bring in complex numbers. 
5² + b² = (2√2)²
25 + b² = 2²(√2)²
25 + b² = 4(2)
25 + b² = 8
b² = 8 - 25
b² = - 17
b = √-17
b= (√17i)
Then the problem with THIS is a measurement/distance cannot be negative... which goes against exactly what that complex number i is. 
 
        
             
        
        
        
Answer:
what
Step-by-step explanation:
sure?