The circle has an area of 25 in2. What is the area of the green sector? (Use 3.14 for .) I'll draw the circle and show what work I've done. Please tell me where I'm going wrong.

Question

anonymous · Answer

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anonymous · Answer

What I've done is take the equation measure of arc/360 * the area of the circle. 
(90/360) * 78.5.
.25 * 78.5
19.625

mathstudent55 · Answer

1. Those numbers are the measures of central angles?
2. Which section is green?

anonymous · Answer

Yes those are the central angles. The green one is 90 degrees.

mathstudent55 · Answer

Why are you using 78.5 for the area when the problem states the area is 25?

anonymous · Answer

Oh sorry it's 25 with the pie symbol. I took 25*3.14 and got 78.5.

mathstudent55 · Answer

Ok, I got it.
I don't see anything wrong in what you're doing.
area of sector = (angle measure of sector/360) * area of circle

anonymous · Answer

Hmm. Okay thanks. My answer choices don't provide that answer but I thought that was right, too. I'll talk to my teacher in the morning. Thanks!

mathstudent55 · Answer

What are the choices? Maybe we can figure this out together.