Мы знаем,что у треугольника 3 стороны, значит чтобы найти периметр,нужно их сложить.
P∆=a+b+c.
Чтобы найти периметр, нужно знать его все стороны.
Пусть x будет коэффициент, значит 6х,5х,4х} стороны треугольника. P=75см.
По условию задачи составим и решим уравнение:
6х+5х+4х=75см.
15х=75см.
х=75:15
х=5
Мы узнали сколько будет x, тогда узнаем все остальные его стороны.
|ст.=6х=6•5=30см.
||ст.=5х=5•5=25см.
|||ст.=4х=4•5=20см.
ПРОВЕРКА:
30 СМ + 25 СМ + 20 СМ=75 СМ.
75см.=75см.
ответ: |ст.=30см.;
||ст.=25см.;
|||ст.=20см.
middle line into two trapezoids
Объяснение:
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