The radius was divided by 2.
31.4 = 2pi * r
31.4/2pi = 15.7/pi
15.7 = 2pi * r
15.7/2pi = 7.85/pi
(7.85/pi) / (15.7/pi) = 1/2
Answer:
radius was divided by 2
Step-by-step explanation:
A circle that originally had a circumference of 31.4 cm, now has a circumference of 15.7 cm
Circumference of a circle formula = [tex]2\pi r[/tex]
where 'r' is the radius of a circle
circumference of 31.4 cm
31.4 = [tex]2\pi r[/tex]
the value of pi is 3.14
31.4 = [tex]2*3.14 r[/tex]
divide both sides by 3.14 *2
r=5
circumference of 15.7 cm.
15.7 = [tex]2\pi r[/tex]
the value of pi is 3.14
15.7 = [tex]2*3.14 r[/tex]
divide both sides by 3.14
[tex]r=2.5[/tex]
Originally the radius = 5 cm and now the radius is 2.5 cm
It was divided by 2
