Question

find the perimeter, include the unit.

Explanation:

Step1: Recall the formula for the perimeter of a triangle

The perimeter \( P \) of a triangle is \( P=a + b+ c\), where \(a\), \(b\), and \(c\) are the lengths of the sides of the triangle.

Step2: Identify the side lengths

Here, \(a = 18\space cm\), \(b = 18\space cm\), and \(c = 24\space cm\).

Step3: Calculate the perimeter

Substitute the values into the formula: \(P=18 + 18+24\).
First, \(18+18 = 36\), then \(36 + 24=60\).

Answer:

\(60\space cm\)