The characteristic of the repeating shapes in a tessellation is that shapes cannot have spaces between them.
<h3>What is tessellation ?</h3>
When we talk about tessellation, our minds go to a situation in which many shapes especially polygons are packed together without spaces between them.
Thus, the characteristic of the repeating shapes in a tessellation is that shapes cannot have spaces between them.
Learn more about tessellation: brainly.com/question/3294818
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Step-by-step explanation:
- A circle is only composed of the points on the border
- The distance around the circle is called circumference
 
        
             
        
        
        
Answer:
<h3>                
33°</h3>
Step-by-step explanation:
Sum of measures of angles in any triangle is 180°
The maesure of right angle is 90°
So:  m∠EFD = 180° - 90° - 57° = 33°