Предмет: Математика, автор: akbayan777

ширина прямоугольника 4 целых 1,5 что составляет 1,2 его длины. найдите периметр прямоугольника

Ответы

Автор ответа: prettypushkova

P = (a + b) * 2 - формула периметра прямоугольника

а = 4 1/5 - ширина (1/2 длины)

b = 4 1/5 * 2 = 21/5 * 2 = 42/5 = 8 2/5 - длина

Р = (4 1/5 + 8 2/5) * 2 = 12 3/5 * 2 = 63/5 * 2 = 126/5 = 25 1/5 - периметр

Ответ: Р = 25 1/5 (единиц измерения).

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