Question

In sistemul cartezian xOy se considera punctele A(2,2) , B(2,5) si C(6,5). Determinati perimetrul triunghiului ABC.

Answer 1

AB=$\sqrt{( 2-2)^{2}+ (5-2)^{2} } = \sqrt{9} =3$
BC=$\sqrt{( 6-2)^{2}+ (5-5)^{2} } = \sqrt{16} =4$
AC=$\sqrt{( 6-2)^{2}+ (5-2)^{2} } = \sqrt{16+9} =\sqrt{25}=5$
p ABC= 3+4+5=12 cm