enzo291205 enzo291205

Today at 12:48 PM
Mathematics

Answered

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

Answer :

ghanami ghanami

Today at 12:53 PM

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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