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clo456
@clo456
January 2021
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bonsoir, pouvez vous m'aidez pour l'exercice 20. Je ne comprends pas l'énoncé, je ne sais pas par quoi commence ect..
Merci d'avance
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calinizou
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Bonsoir
db²=ad²+ab²
db²=24²+143²
db²=576+20449
db²=21025
donc db racine carré de 21025=145m
db²=dc²+cb²
21025=dc²+17²
dc²=21025-289
dc²=20736
donc dc =racine carré de 20736=144m
total parcours ab+bc+cd+da
143+17+144+24=328m
1.8km=1800m
1800=328*5+160
on part de a, 5tours on fait 160m 143+17 donc on arrive au point c
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clo456
mille merci!
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Verified answer
Bonsoirdb²=ad²+ab²
db²=24²+143²
db²=576+20449
db²=21025
donc db racine carré de 21025=145m
db²=dc²+cb²
21025=dc²+17²
dc²=21025-289
dc²=20736
donc dc =racine carré de 20736=144m
total parcours ab+bc+cd+da
143+17+144+24=328m
1.8km=1800m
1800=328*5+160
on part de a, 5tours on fait 160m 143+17 donc on arrive au point c