J'ai arriver a faire le AD au carré mais pour le BE , AC BC ect...???.... Pergunta de ideia deSangohan59

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J'ai arriver a faire le AD au carré mais pour le BE , AC BC ect...???

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MichaelS

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$AB^2=(9-5)^2+(3-6)^2\\
AB^2=4^2+(-3)^2\\
AB^2 = 16 + 9\\
AB^2 = 25\\
AB = 5\\\\
BC^2=(-4-9)^2+(7-3)^2\\
BC^2=(-13)^2 + 4^2\\
BC^2 = 169 + 16\\
BC^2 = 185\\
BC \sqrt{185}\\\\ 
DE^2 = (-8-2)^2 + (-1-(-7))^2\\
DE^2 = (-10)^2+6^2\\
DE^2 = 100 + 36\\
DE^2 = 136\\
DE = \sqrt{136} \\\\
AE^2 = (-8-5)^2+(-1-6)2\\
AE^2 = (-13)^2 + (-7)^2\\
AE^2 = 169 + 49\\
AE^2 =218\\
AE = \sqrt{218}$

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Sangohan59 et pour l'ex 1 s'il te plait ?

Exercice 24 page 178

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Exercice 24 page 178

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