Question

find the perimeter of a triangle with sides 3 cm, 4 cm, and 5 cm. 12 24 50 60

Explanation:

Step1: Recall the formula for perimeter of a triangle

The perimeter \(P\) of a triangle with side lengths \(a\), \(b\), and \(c\) is \(P=a + b + c\).

Step2: Substitute the given side lengths

Here, \(a = 3\space\text{cm}\), \(b=4\space\text{cm}\), and \(c = 5\space\text{cm}\). So \(P=3 + 4+5\).

Step3: Calculate the sum

\(3+4 + 5=(3 + 4)+5=7 + 5=12\space\text{cm}\)

Answer:

12