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If the radius of a circle is 4cm, what is the area?

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Jun 19, 2018

Answer:

#"50.24 cm"^2#

Explanation:

Using the formula,

#"Area" = pi xxr^2#

Here

  • #pi# is a button on your calculator you can find, but is also generally known as #3.14#, you can use either one, but teachers usually prefer you use the #pi# button.
  • #r =# the radius, in your case, it's #"4 cm"#

So

#"Area" = pi xxr^2#

#= pi xx ("4 cm")^2#

# = 16pi \ "cm"^2 ~~ "50.24 cm"^2#

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