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ElizavetaRay
@ElizavetaRay
October 2021
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Решите пожалуйста, заранее спасибо.
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Verified answer
1) p = (a+b+c)/2 = (3+8+7)/2=9
S=√ (p(p-a)(p-b)(p-c)) = √ 9(9-3)(9-8)(9-7)=√(9*6*1*2)=√108=√(3*36)=6√3
2) S=1/2 * a*b*sin59°≈1/2*8*4*0,857≈13,7
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Answers & Comments
Verified answer
1) p = (a+b+c)/2 = (3+8+7)/2=9S=√ (p(p-a)(p-b)(p-c)) = √ 9(9-3)(9-8)(9-7)=√(9*6*1*2)=√108=√(3*36)=6√3
2) S=1/2 * a*b*sin59°≈1/2*8*4*0,857≈13,7