Answer:
r = 8
Step-by-step explanation:
59 = 7r + 3
Switch sides:
7r + 3 = 59
Subtract 3 from both sides:
7r = 56
Divide both sides by 7:
r = 8
Start with

Multiply both sides by 3:

Recall that 21/5=4.2 to claim the correct answer.
Answer:
6
any more help just ask :)
Answer:
You could cut it up into pieces and create and the the sides into 4 extra edges, 2 of them being the same as each other and the other 2 of them being the same as each other.