Malone Harper
10/11/2023 · Middle School

3. prendre la valcur de \( \pi=3,14 \). a) Calculer l'aire et le périmètre d'un disque de 76 cm de diamétre. b) L'aire d'un disque mesure \( 3846,5 \mathrm{~cm}^{2} \). Combien mesure son rayon? \( \frac{2}{3.14 .76}=238 \cdot 64 \mathrm{~cm} \)

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### a) Pour un disque de 76 cm de diamètre : - Aire : environ 4539,76 cm² - Périmètre : environ 238,64 cm ### b) Pour un disque d'une aire de 3846,5 cm² : - Rayon : environ 34,96 cm

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