Question

2. Given the perimeter of the figure is 35 km,

Find the missing side length.
X
9 km
4 km
3 km
12 km

Answer 1

x = 7 km

Explanation:

Perimeter of a polygon is P = sum of the sides of a polygon

In this figure we are given all the sides except one designated as x and the perimeter

We can add up all the sides and solve for x

Sum of sides = 4 + 3 + 12 + 9 + x

Perimeter = 35

=> 4 + 3 + 12 + 9 + x = 35

=> 28 + x = 35

=> x = 35 - 38 = 7