Вопрос школьника по предмету Математика
Длина большей стороны треугольника равна 5,6 дм. и она больше меньшей стороны на 1,9 дм. Найдите периметр треугольника, если длина его третьей стороны равна среднему арифметическому двух других сторон.
Ответ учителя по предмету Математика
1) 5,6 — 1,9 = 3,7 (см) — меньшая сторона
2) (5,6 + 3,7) ÷ 2 = 4,65 (см) — третья сторона
3) 5,6 + 3,7 + 4,65 = 13,95 (см) — периметр треугольника
Ответ: Периметр треугольника равен 13,95 (см).
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