Question

find the perimeter. include the unit. 10 m 9 m 11 m

Explanation:

Step1: Recall the formula for perimeter

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 values of the side - lengths

Here, \(a = 10\space m\), \(b=9\space m\), and \(c = 11\space m\). Then \(P=10 + 9+11\).

Step3: Calculate the sum

\(10+9 + 11=(10 + 11)+9=21 + 9=30\).

Answer:

\(30\space m\)