Question

Find the length of segment CD with points C(2,2) and D (-1,8)

A. 8.1
B. 5.2
C. 4.3
D. 6.7

Answer 1

D

Explanation:

Calculate the length using the distance formula

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = C(2, 2) and (x₂, y₂ ) = D(- 1, 8)

CD =
`√((-1-2)^2+(8-2)^2)`

=
`√((-3)^2+6^2)`

=
`√(9+36)` =
`√(45)` ≈ 6.7 → D