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2014-09-29T20:28:57+03:00
mADC=mBDC+ mADB= 56+29= 85
=> mDCB= 360 -110-110-85=55
In ΔDBC: mDBC= 180 -mD- mC= 180 - 56- 55= 69
=> mABD= mABC- mCBD= 110- 69 = 42
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