Respostas
A=(-3, 7)
B=(5, 1)
C=(1, 2)
BC=
Perímetro:
P=10+√17+√41
A ( -3 ; 7 ) AB = √((1-7)² + (5-(-3))²) = √((-6)² + (5+3)²) =
B ( 5 ; 1 ) = √(36 + 8²)
C ( 1 ; 2 ) = √(36 + 64)
= √100
P = AB + BC + CA = = 10
= 10 + √17 + √41
≈ 20,53 BC = √((2-1)² + (1-5)²) = √(1² + (-4)²) =
= √(1 + 16) =
= √17
CA = √((7-2)² + (-3-1)²) = √(5² + (-4)²) =
= √(25 + 16) =
= √41