I'm confused about these questions. I don't know how I'm supposed to write an equation of a circle with the area/circumference and pi. Please show work because I really need help and to understand this. Please help.

Guest Sep 26, 2019

#1**0 **

If circumference is 14 pi

Circumf = pi * d so d = circumf / pi = 14 radius = 7

Circle with center at h,k and radius r formula is (x-h)^2 + (y-k)^2 = r^2 (remember that?)

(x-10)^2 + (y-7)^2 = 7^2

Area = pi r^2 400pi /pi = radius^2 = 400 r=20

(x+4)^2 + (y+5)^2 = 400 (edited typo)

the last two are similar and youo should try them yoursefl

ElectricPavlov Sep 26, 2019

#1**0 **

Best Answer

If circumference is 14 pi

Circumf = pi * d so d = circumf / pi = 14 radius = 7

Circle with center at h,k and radius r formula is (x-h)^2 + (y-k)^2 = r^2 (remember that?)

(x-10)^2 + (y-7)^2 = 7^2

Area = pi r^2 400pi /pi = radius^2 = 400 r=20

(x+4)^2 + (y+5)^2 = 400 (edited typo)

the last two are similar and youo should try them yoursefl

ElectricPavlov Sep 26, 2019