Question

Finding a side length given the perimeter and side lengths with...

The perimeter of the pentagon below is 61 units. Find the length of side DE.
Write your answer without variables.
E
12
3z
2z+3
11
B
z

Answer 1

Hello,

Explanation:

The sum of ths sides is 12+3+2z-1+z+11z+3z=25+6z

25+6z=31

6z=61-25

3z=36

z=6

DE=3*6=18 (units)