Question

In triunghiul ABC, m( ∠B )=90°, AB=4,5 cm si aria de 9 cm². Calculati AB-BC!!!!

Answer 1

$A= \frac{AB*BC}{2}; \\ 9= \frac{4,5*BC}{2} ;BC= \frac{18}{4,5} = 4cm \\ AB-BC=4,5-4=0,5 cm$