Quelqu’un peu m’aider svp merci d’avance ❤️.... Pergunta de ideia deloriane14

loriane14 @loriane14

December 2020 1 70 Report

Quelqu’un peu m’aider svp merci d’avance ❤️

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barthyanastro007

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Nb : Le poteau est cassé à 3 m du dol, son sommet touche le sol à 10,5 m du pied et forme un triangle APS rectangle en P.

• Calculons AS :

On sait que :

${(AS)}^{2} = {(AP)}^{2} + {(PS)}^{2}$

On a :

$AP = 3\;m$

$PS = 10,5\;m$

Alors :

${(AS)}^{2} = {(3)}^{2} + {(10,5)}^{2}$

${(AS)}^{2} = 9 + 110,25$

${(AS)}^{2} = 119,25$

$\sqrt{{(AS)}^{2}} = \sqrt{119,25}$

$AS = 10,9\;m$

$AS = 11\;m$

Calculons la hauteur SP du poteau avant son foudroiement :

$SP = AP + AS$

$SP = 3\;m + 11\;m$

$\boxed{\boxed{SP = 14\;m}}$

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