what shape has area 13 and perimeter 21?

Question

if the area is 13 and the perimeter is 21 what is the shape

Answer 1

2-d shape, rim length=21, area=13

area/leng=0.6190476

first tri serkel...it hav the biggest area/length av NE shape

area=pi*r*r

rim length=2pi*r

area/rim length=r/2

serkel area=pi*r*r  =13, so r*r=13/pi=4.13802859

r=root(4.1....)=2.0342145

area/length=2.0342145/2=1.017107

Yer data is smaller than this, so it is possabel (legal

It kan be NE shape, but not a serkel