The perimeter of a triangle can be found by adding up all the sides
so the perimeter is :
5 + 8 + x =
13 + x <==
I think the answer is 3cm I’m not 100% sure
Answer: 
Step-by-step explanation:
Given , A farmer plowed a rectangular section of land for a new crop.
Dimensions of the section is given by :-
Length by width = 
Since , the area of a rectangle = length x width
Then, the total area in yards of plowed section of land will be:

Hence, the total area in yards of plowed section of land = 