2 years ago

ABC est un triangle rectangle en B. On donne : AB = 7:BC = a et AC = a +5. Calcule a

Mathematics

1 answer:

Afina-wow [57]2 years ago

8 0

Answer:

Step-by-step explanation:

salut :

en utilisant le theorem de Pythagore on obtient :

AC²= AB² + BC²

(a+5)² = 7²+a²

a²+10a+25 = 49+a²

10a+25 =49

10a =24

donc : a = 24/10 = 12/5 = 2.4 unit

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