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Chtis1180 @Chtis1180

January 2021 1 89 Report

Bonjours tout le monde urgent merci d'avance a ce qui m’aideront

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anylor Bonsoir,
il faut calculer PE
PE² = PM² +ME²
5√6 + 2√24 = 25×6 + 4×24 = 150+96=246
PE² =246

SE²+SP² = PE²
SE² =PE²-SP²
= 246 - (27×2) =246 -54
=192
SE = √192

périmètre de PMES =
√192+ √54 + 5√6 +2√24 valeur exacte
43,25 cm valeur approchée

aire =
5√6 ×2√24 /2 + √54 ×√192 / 2
120/2 +√(10368) /2
60 + 72√2 /2

= 60 +36√2
= 110,9 cm² valeur approchée

pour info
√10368 = √(3^4×2^7)= 3² ×2³√2 = 72√2

2 votes Thanks 1

Chtis1180 Merci bcq

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