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Hanaana
@Hanaana
May 2019
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Merci d'avance .......
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trudelmichel
Verified answer
Bonjour,
RS=6.5
ST=5.2
RT=3.9
6.5²=42.25
5.2²=27.04
3.9²=15.21
je remarque que:
42.25=27.04+15.21
6.5²=5.2²+3.9²
d'où
RS²=ST²+RT²
Le triangle RST est rectangle
RS est l'hypothénuse et RTS est l'angle droit
cosTRS=RT/RS
cos TRS= 3.9/6.5
cos TRS=0.6
angle TRS=53.1°
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Verified answer
Bonjour,RS=6.5
ST=5.2
RT=3.9
6.5²=42.25
5.2²=27.04
3.9²=15.21
je remarque que:
42.25=27.04+15.21
6.5²=5.2²+3.9²
d'où
RS²=ST²+RT²
Le triangle RST est rectangle
RS est l'hypothénuse et RTS est l'angle droit
cosTRS=RT/RS
cos TRS= 3.9/6.5
cos TRS=0.6
angle TRS=53.1°