Question

Mostre que o triangulo do vertices A(0,7) B(4,4) e C(7,8) é retangulo.

Answer 1

AB² = (0-4)²+(7-4)² = 16+9 = 25
AC² = (0-7)²+(7-8)² = 49+1= 50
Bc²= (4-7)²+(4-8)² = 9+16= 25

Q Ac²= ab²+bc² => 50=25+25