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Sagot :

Réponse:

Bonsoir

SRT = 180⁰ , S = ? , R = 90⁰ , T = 29⁰

donce : 90⁰+29⁰=119⁰ . 180⁰_119⁰ =61 ⁰ . S =61⁰

cos(s) = RT/TS

cos(s) 61 = RT/8

cos(s) 61 × 8 = 3,87

RT= 3,87 environ

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