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The perimeter is 11.12.
We use the distance formula to find the length of each segment that makes up the quadrilateral:
For RS:
For ST:
For TU:
For UR:
This gives us a perimeter of 2+3+2+4.12 = 11.12
We use the distance formula to find the length of each segment that makes up the quadrilateral:
For RS:
For ST:
For TU:
For UR:
This gives us a perimeter of 2+3+2+4.12 = 11.12
For E to be the midpoint of DF, it needs to divide DF in 2 equal segments, DE and EF. If E is the midpoint of DF, then DE and EF are equal, so the reason is that the expressions for DE and EF are equal. The reason is: