Question

În triunghiul abc măsura unghiului a egal 90 de grade AM mediană , AM =15 cm cos(B) = 4/5 AB =...cm

Answer 1

$\displaystyle\\ m(\sphericalangle A)=90^o~~~\Longrightarrow~~~BC~~\text{este ipotenuza.}\\\\ AM = 15~cm~~~\Longrightarrow~~~BC=2\cdot AM =2\cdot 15 =30~cm\\\\ cos(B)=\frac{4}{5} \\\\ cos(B)=\frac{AB}{BC}=\frac{4}{5} \\\\ AB= \frac{BC\cdot 4}{5}=\frac{30\cdot 4}{5}=6\cdot 4 = \boxed{\bf 24~cm}$

Answer 2

Am anexat o rezolvare !