Answer:
The number of edges is 
Step-by-step explanation:
we know that
The Euler's formula state that, the number of vertices, minus the number of edges, plus the number of faces, is equal to two
so

In this problem we have

substitute and solve for E


analyze problem
perfect circle with diameter of 20
so, radius is 10
circle circumference=10*pi*r
31.4*2
62.8
Answer:
dont know need points
Step-by-step explanation: