Question

The perimeter of the obtuse triangle to the right is 7.2 inches. Two of the three sides are labeled. What is the measurement of the third side?

Answer 1

Measure of third side = 2.1 inches

Explanation:

Perimeter of any polygon = Sum of lengths of all sides of the polygon

From the figure attached,

Number of sides of the polygon = 3

Therefore, perimeter of a triangle = sum of all three sides of the given triangle

Length of two sides = 1.7 inches and 3.4 inches.

Let the third side = x inches

Perimeter of the triangle = 7.2 inches

By the definition of the perimeter,

7.2 = 1.7 + 3.4 + x

7.2 = 5.1 + x

x = 7.2 - 5.1

x = 2.1 inches

Therefore, third side of the given triangle is 2.1 in.