The angle of 1/4 of a circle is given by:
 (1/4) * (360) = 90 degrees
 We now look for the angle that results from dividing 1/4 of a circle into three equal parts.
 We have then:
 (1/3) * (90) = 30 degrees.
 Answer:
 the measure of each part is:
 30 degrees
        
             
        
        
        
<span>619.473970397 here is the square root</span>
        
                    
             
        
        
        
The ratio of the surface area to the volume will decrease