Chapter 11.6

Areas of Circles, Sectors, and Segments.


So friday in class we learned about sectors, segments, and ares of circles.

The area of a circle:
A sector of a circle is a regioun bounded by the two radii and an arc of the circle.

Area of sector: A=(m/360)πr²

*where m=measure of arc

OR

http://www.mathopenref.com/arcsector.html

A segment of a circle of a circle is a region bounded by a chord of the circle and its corresponding arc.  

The yellow part above is the segment of the circle.

AB is the chord.

To find the segment of a circle= area of the sector-area of triangle AOB. That is the easiest way. In fomula way, A=(m/360)πr² -(1/2)bh

Where m=measure of arc AB and bh is base times height.

http://www.mathopenref.com/segmentarea.html

That's all we learned on Friday, pretty easy. Sorry it's posted so late!

-Elizabeth (lost the game) Quigley