SOLUTION: Equilateral triangle MNP has a perimeter of 24a+30b line segment QR is a midsegment. What is QR?

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Question 1025414: Equilateral triangle MNP has a perimeter of 24a+30b line segment QR is a midsegment. What is QR?
Answer by ikleyn(52803) About Me  (Show Source):
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Equilateral triangle MNP has a perimeter of 24a+30b line segment QR is a midsegment. What is QR?
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|QR| = %2824a+%2B+30b%29%2F6 = 4a + 5b.

The length of the midsegment is half of the parallel side length.