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tal14
@tal14
August 2022
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как найти площадь равностороннего треугольника со стороной 6 см
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Bergo
S=1/2*a*h
1/2a=3
найдем h по теореме пифагора:
h^2=b^2-a^2 , где b=6
h^2=6^2-3^2=36-9=27
h=√27
S=3*√27=3√27=√9*27=√243=√81*3=9√3
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Thanks 4
Andr1806
S=3*√27=3√27=9√3.
12332211
S = (√3 * a²)/4a = 6 см
S = (√3 * 6²)/4 = √3 * 9 ≈ 15,6 см²
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Thanks 1
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Answers & Comments
1/2a=3
найдем h по теореме пифагора:
h^2=b^2-a^2 , где b=6
h^2=6^2-3^2=36-9=27
h=√27
S=3*√27=3√27=√9*27=√243=√81*3=9√3