# Math Geo help Ms Sue?

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I have two questions about two circles.

A.First circle shows half a line measuring 4mm using 3.14 for pie. I came up with an answer that is wrong.:(

B.Second circle same pie but with a line all the way across the circle measuring 18cm. I got this one wrong?

Please help with steps on each? I want to understand what I got wrong so I can do better.

• Math Geo help Ms Sue? -

What questions are you trying to solve?

Circumference? Area? ??

• Math Geo help Ms Sue? -

area

• Math Geo help Ms Sue? -

A. Radius = 4

A = pi * r^2
A = 3.14 * 4^2
A = 3.14 * 16
A = 50.24 sq. cm.

B. Radius = 9 cm

Solve this the same was that I solved A.

• Math Geo help Ms Sue? -

I really understand thank you.

• Math Geo help Ms Sue? -

You're welcome. :-)

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