cos α = b²+c²-a²/2bc=64+81-49/144=96/144≈0,67 , a≈48°.
cos β = a²+c²-b²/2ac=49+81-64/126=66/126≈0,523 , β≈59°.
Тогда γ=180°-48°-59°=73°.
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cos α = b²+c²-a²/2bc=64+81-49/144=96/144≈0,67 , a≈48°.
cos β = a²+c²-b²/2ac=49+81-64/126=66/126≈0,523 , β≈59°.
Тогда γ=180°-48°-59°=73°.