Предмет: Математика, автор: aallashuptaghgvbb

Допоможіть будь ласка дам 50 балов пж

Приложения:

Ответы

Автор ответа: romanbouko95
0

Відповідь: 53 cm

Покрокове пояснення:

У трикутника три сторони. Перша сторона a, друга сторона b, третя сторона c. За умовою: a = 8cm, b = 3*a, c = b - 3cm.

Спочатку розрахуємо другу сторону, бо вже відома довжина a

b = 3*a = 3*8 cm = 24cm

Тепер розрахуємо третю, бо вже відома довжина b

c = 24cm - 3cm = 21cm

Периметр — сума усіх сторін фігури. Просумуємо довжини усіх сторін, щоб знайти периметр

P = a + b + c = (8 + 24 + 21) cm = (29 + 24) cm = 53 cm

P = 53 cm

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