Вопрос школьника по предмету Математика
длина прямоугольникаравна 20см а ширина в 4 раза меньше .найдите периметр и площадь этого прямоугольника.
Ответ учителя по предмету Математика
а=20
в-?
20:4=5
в=5
P-?
S-? 2
S=20*5=100см
P=а+в*2=50
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