Area=pi times radius^2 so
if area=4pi=pi times r^2
4 times pi=r^2 times pi
divide both sdies by pi
4=r^2
square root
2=radius since legnth cannot be negative
radius=1/2 diamters
2 radius=diameter
2(2)=diameter=4
diameter=4
Answer: 7(d+56)=63d
Step-by-step explanation:
U add the 7 +56 and the answer is 63d plz mark brainly
(3x+1)-(x+12)
(24+1)- 20
25-20=5
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