A. -5 i think it is the right answer
Heyy, the answer is 65 degrees if you don’t get it i can explain it to you!!
Width= 1/2x length=x
to find the perimeter, it's the width+width+length+length so:
1/2x+1/2x+x+x=54
3x=54
x=18
the length is 18 cm and the width is 9 cm
Remark
I'm just going to eave a very short note and if you answer quickly in the comments, I'll come back and edit the question.
Argument
If consists of 2 sides and 2 semicircles. Without a width, there is no number to be given. We can get a formula
Fomula
Perimeter = 2*sides + 2pi *w/2
Perimeter = 2*13 + pi*W
