Question

Estimate the length of the radius, if the area of a circle is 247 mm2.





A.9.78 mm



B.23.87 mm



C.4.43 mm



D.8.87 mm

Answer 1

The equation for the area of a triangle is
\[A=\pi r ^{2}\]
You were given the area, and pi is a number, so you just have to solve for r

Answer 2

circle

Answer 3

You're looking for the radius, right?

Answer 4

of a circle yes not a triangle

Answer 5

The equation is for the area of a circle.

Answer 6

If you plug everything in, you'd have
\[\sqrt{\frac{ 247 }{ \pi }} = r\]
Which simplifies to about 8.87 mm

Answer 7

thank you☻

Answer 8

no problem :)