Answer:
11 units
Step-by-step explanation:
To calculate CD use the distance formula
d = √ (x₂ - x₁ )² + (y₂ - y₁ )²
with (x₁, y₁ ) = C(- 4, 6) and (x₂, y₂ ) = D(- 4, - 5)
CD = [tex]\sqrt{(-4+4)^2+(-5-6)^2}[/tex]
= [tex]\sqrt{0^2+(-11)^2}[/tex]
= [tex]\sqrt{0+121}[/tex] = [tex]\sqrt{121}[/tex] = 11
