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41 votes
41 votes
PLS HELP ASAP the area of the circle is 64pi square cm what is the radius of the circle in cm

8 cm
9cm
6cm
16cm

User Corey Levinson
by
2.4k points

2 Answers

18 votes
18 votes

Answer:


\huge\boxed{\bf{radius_(circle) = 8cm}}

Explanation:

Given:-


  • \tt Area_(circle) = 64\pi cm^2

To find:-


  • \tt radius_(circle) = ?

Ans:-


\sf \to Area_(circle) = \pi*r^2


\sf \to 64\cancel{\pi} cm^2 = \cancel{\pi}*r^2


\sf \to 64cm^2 = r^2


\sf \to r = √(64cm^2)


\sf \to r = 8cm

therefore
\tt radius_(circle) = 8cm


\:


\huge\colorbox{skyblue}{BlackPain}

User J Fabian Meier
by
2.5k points
17 votes
17 votes

Answer:

8cm

Explanation:


Here,\\\\Area(A)=64\pi cm^(2) \\Radius(r)=?\\\\As\:we\:have,\\\\\hookrightarrow Area=\pi r^(2) \\\\\hookrightarrow (64\pi cm^(2) )/(\pi ) =r^(2) \\\hookrightarrow 64 cm^(2) =r^(2) \\\\\hookrightarrow \sqrt{64cm^(2) } =r\\\\\hookrightarrow 8cm=r\\\\\hookrightarrow r=8cm

User Fakorede
by
3.0k points