How do you find the area of a circle with radius 5 mm, rounded to the nearest tenth?

Question

14795 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-07-31T03:52:03

#=color(blue)(79 mm^2#

The area of a circle is given by formula:
#color(blue)(pir^2#

#pi# has a constant value of #3.14#

And the radius of the circle is #5mm#

The area #= pir^2 = 3.14 xx (5)^2mm^2#

#=3.14 xx (25)#

#=78.5 mm^2#

#approxcolor(blue)(79 mm^2#