Question

calculate the perimeter of the following irregular shape. type only the number value in the answer space to the nearest whole number.

Explanation:

Step1: Identify all outer side lengths

First, we can "unfold" the indentations to find the equivalent perimeter of a rectangle plus the extra vertical segments. The outer rectangle has dimensions: length $12$ in, width $9$ in. The extra vertical segments are two $3$ in lengths.

Step2: Calculate rectangle perimeter

Perimeter of rectangle: $2\times(12 + 9)$
$=2\times21=42$ in

Step3: Add the extra segments

Add the two 3-inch segments: $42 + 3 + 3$
$=42+6=48$ in

Answer:

48