Sagot :
théorème de Pythagore.
[tex] {ef}^{2} = {ed}^{2} + {df}^{2} [/tex]
[tex] {ed}^{2} = {3.7}^{2} - {1.3}^{2} [/tex]
[tex] {ed}^{2} = 13.69 - 1.69[/tex]
=12
=
[tex] \sqrt{12} [/tex]
environ 3.5 cm
théorème de Pythagore.
[tex] {ef}^{2} = {ed}^{2} + {df}^{2} [/tex]
[tex] {ed}^{2} = {3.7}^{2} - {1.3}^{2} [/tex]
[tex] {ed}^{2} = 13.69 - 1.69[/tex]
=12
=
[tex] \sqrt{12} [/tex]
environ 3.5 cm