- #1
denian
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in triangle PQR, PQ = a, QR = a + d, RP = a + 2d, and angle PQR is more than 120 degree., where a and d are positive constants. show that
2a/3 < d < a.
i tried to think, but i really don't know how to start to solve this question. hope for some clue.
thank you
2a/3 < d < a.
i tried to think, but i really don't know how to start to solve this question. hope for some clue.
thank you