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Sagot :

VINS

bonsoir

AB² = 20 ² +20 ² = 800

AB = √800 =   20 √2

CD² = 30 ²+ 20 ² = 1 300

CD = √ 1 300

DE² =  idem AB²

AF² = 40² + 20 ² =  2 000

AF = √ 2 000

BC = 60

FE =  110 - 60 = 50

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