Respuesta :

Answer:

50.27

Step-by-step explanation:

perimeter= length of arc + 2r= 14.28

length of arc= rx where x is the angle which is pi/2

radius =4

area= pi* r^2= 50.27

Answer:

Circumference= 2πr

Circumference= perimeter  

14.28km= 2(3.14)r

14.28= 6.2831853072r

divide both sides by 6.2831853072

2.27= r

ANSWER: The radius is 2.27km

Hope this helps!

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