Objectives:
1)To find the areas of circles, sectors, and
segments of circles.


The area of a circle is the product of π and
the square of the radius.
A = πr²

A circular archery target has a 2 foot diameter. It is
yellow except for a red bulls-eye at the center with a
6-in diameter. Find the area of the yellow region.
Round to the nearest whole number.

How much more pizza is in a 12-in diameter
pizza than in a 10-in pizza?
A sector of a circle is a region bounded by an
arc of the circle and the two radii to the arcs
endpoints.
 You name a sector using
one arc endpoint, the
center of the circle, and
the other arc endpoint.



The area of a sector is a fractional part of the
area of the circle.
Formula:


Find the area of the sector. Leave in terms of
π
Sector ACB


A chord is a line that goes from one point on
a circle to another, not going through the
center.
A part of a circle bounded by an arc and the
segment joining its endpoints is a segment of
a circle.
Area of Sector
Area of Triangle
-
Area of Segment
=

Find the area of the segment of the circle.