ranyalarbi09 ranyalarbi09

03-01-2024
Mathematics

contestada

Sur la figure ci-contre, SABCD est une pyramide `a base carrée de hauteur [SA] telle que AB = 9 cm et SA = 12 cm. Le triangle SAB est rectangle en A.EFGH est la section de la pyramide SABCD par le plan parallèle `a la base et telle que SE = 3 cm 1.
(a) Calculer EF.
(b) Calculer SB.

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