1. с^2 = a^2 + в^2 - 2ав*cosC
cosC= 196+324-400 / 504= 0.2380
уголC=76 град и 10'
2. a^2 = b^2 + c^2 - 2bc*cosA
cosA= 324 + 400-196 / 720=0.7333
уголA=42град и 46'
3. уголB= 180-76 10' - 42 46'= 61 4'
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1. с^2 = a^2 + в^2 - 2ав*cosC
cosC= 196+324-400 / 504= 0.2380
уголC=76 град и 10'
2. a^2 = b^2 + c^2 - 2bc*cosA
cosA= 324 + 400-196 / 720=0.7333
уголA=42град и 46'
3. уголB= 180-76 10' - 42 46'= 61 4'