Alexander's back yard is in the shape of a pentagon. The perimeter is 134 meters. Four of the sides measure 20,21,32 and 35 meters. What is the length of the fifth side?
Add: 20 + 21 + 32 + 35 = ?
Subtract that total from 134.
26
I am not so sure but i think it's 21
To find the length of the fifth side, we can subtract the sum of the lengths of the four known sides from the perimeter.
The perimeter of a polygon is the sum of the lengths of all its sides. In this case, the perimeter is given as 134 meters.
We know the lengths of four sides: 20 meters, 21 meters, 32 meters, and 35 meters. To find the length of the fifth side, we need to subtract the sum of these four known lengths from the total perimeter:
Perimeter = Sum of all side lengths
134 meters = 20 meters + 21 meters + 32 meters + 35 meters + Length of the fifth side
Now, let's solve this equation to find the length of the fifth side:
134 meters = 20 meters + 21 meters + 32 meters + 35 meters + Length of the fifth side
134 meters = 108 meters + Length of the fifth side
To isolate the length of the fifth side, we subtract 108 meters from both sides of the equation:
134 meters - 108 meters = 108 meters + Length of the fifth side - 108 meters
26 meters = Length of the fifth side
Therefore, the length of the fifth side is 26 meters.