Question: answer is 39 but how do i get there? In Triangle QR.S, A is the midpoint of QR, B is the midpoint of R.S, and
answer is 39 but how do i get there?

In Triangle QR.S, A is the midpoint of QR, B is the midpoint of R.S, and C' is the midpoint of SQ Also, QA - 10, BR - 15, and SO - 28. What is the perimeter of triangle ABC
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