Question

perimeter = $\boldsymbol{square}$ units

Explanation:

Step1: Identify side lengths

First, find length of $CD$: $|2 - (-10)| = 12$ units.
Find length of $DE$: $|-10 - (-1)| = 9$ units.

Step2: Apply rectangle perimeter formula

Perimeter of rectangle: $2 \times (\text{length} + \text{width})$
Expression: $2 \times (12 + 9)$

Step3: Calculate final value

Simplify the expression: $2 \times 21 = 42$

Answer:

42