Question

Найдите сторону квадрата с периметром см
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$2 \frac{6}{7}$

Answer 1

$P=4x=2\frac{6}{7}\\\\4x=2\frac{6}{7}\\\\x=2\frac{6}{7}:4\\\\x=\frac{14+6}{7}:4\\\\x=\frac{20}{7}:4\\\\x=\frac{5}{7}.$

Answer 2

$P=4a=2\frac{6}{7} =a=\frac{P}{4}=\frac{\frac{20}{7} }{4} =\frac{20}{4*7}=\frac{20}{28}=\frac{5}{7}\\\\\\2\frac{6}{7} =\frac{(2*7)+6}{7}=\frac{14+6}{20}=\frac{20}{7}$

Пошаговое объяснение: