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Wawaza
@Wawaza
August 2022
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Периметр прямоугольника 8 см,а ширина 30 мм.Чему равна длина и площадь прямоугольника.
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superafrodita15
Verified answer
30mm=3cm
P=2a+2b
8=2×3+2b
8=6+2b
-2b=6-8
-2b=-2
b=1(cm)
S=a×b
S=3×1
S=3(cm²)
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Answers & Comments
Verified answer
30mm=3cmP=2a+2b
8=2×3+2b
8=6+2b
-2b=6-8
-2b=-2
b=1(cm)
S=a×b
S=3×1
S=3(cm²)