The union of two sets and , written , is that set that contains all elements that are members of one (or more) of the sets:
Thus:
Answer from: Quest
c.
step-by-step explanation:
she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.
Answer from: Quest
"exterior angles = 360 / number of sides.
60 = 360 / sides
sides = 360 / 60
sides = 6"
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