Réponse:
[tex] {6}^{2} = {5.5}^{2} + {oh}^{2} \\ {oh}^{2} = {6}^{2} - {5.5}^{2} \\ {oh}^{2} = 36 - 30.25 \\ {oh}^{2} = 5.75 \\ oh = \sqrt{5.75 } \\ oh = 2.39[/tex]
[tex] {4}^{2} = {2.39}^{2} + {mh}^{2} \\ {mh}^{2} = {4}^{2} - {2.39}^{2} \\ {mh}^{2} = 16 - 5.71 \\ mh = \sqrt{10.29 } \\ mh = 3.20[/tex]
Air d'un triangle
(B x H) :2
5,5+3,20=8,7
(8,7 x2, 39) :2= 20,79
[tex]air = 20.79 {cm}^{2} [/tex]
