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Q: What is the perimeter for 15 plus 15 plus 10 halves plus 10 halves?

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Perimeter = 15+10+15+10 = 50 units of measurement.

Add all three sides. Perimeter = 15 + 17 + 10 = 42

Two halves of 15 minutes, plus added time.

if you have the length of one side - plus the perimeter... Divide the perimeter by 2, then subtract the known side - this leaves you with the unknown dimension. For example... Say you have a side length of 10, and a perimeter of 30. 30/2 = 15, subtract 10 from that - and you get the missing measurement of 5.

10 + 15 + 20 = 45

5t+15

42

15 + 10 = 25

25 + 15 + 21 + 10 + 11 = 82

-10 + 15 is the same as 15 - 10, which equals 5.

50

15 + (-10) = 5

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