Question

a triangle has sides of length 20 meters, 20 meters, and 17.5 meters. what is the perimeter?
meters
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Explanation:

Step1: Recall perimeter formula for triangle

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

Step2: Substitute the given side lengths

Here, \( a = 20 \) meters, \( b = 20 \) meters, and \( c = 17.5 \) meters. Substituting these values into the formula: \( P = 20 + 20 + 17.5 \).

Step3: Calculate the sum

First, add \( 20 + 20 = 40 \). Then, add \( 40 + 17.5 = 57.5 \).

Answer:

57.5