Question

find the perimeter.
34 cm
20 cm
42 cm
p = ? cm

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 side - lengths of the triangle.

Step2: Substitute the given side - lengths into the formula

Here, \( a = 34\space cm\), \( b = 20\space cm\), \( c = 42\space cm\). Then \( P=34 + 20+42\).

Step3: Calculate the sum

\(34+20 = 54\), and \(54 + 42=96\).

Answer:

\(96\)