Sagot :

ouzzani01

BC² =AB² +AC²

= 3.6² +2.7²

=12.96+7.29

BC² =20.25

BC=

[tex] \sqrt{20.25} [/tex]

BC=4.5

DC² =BC² +BD²

=4.5² +11.7²

= 20.25+136.89

DC² =157.14

DC=racine de 157.14

DC=12.5