1. 6.8 Areas of Circles & Sectors
p. 230

2. Vocabulary
Sector of a circle: the region bounded by two __________ of the circle and their
____________arc
Area of a Circle: vs. Circumference
A = ________ C = ________

3. Ex. 1 Use the formula for area of a circle
Find the indicated measure.

4. Guided Practice #1-3, p. 230 Find the indicated measure.
The diameter of the circle is 11 cm. Find area.
The area of the circle is square yards. Find the radius.
The area of the circle is 1024pi square meters. Find the diameter.

5. Area of a Sector Theorem (Thm 6.21)

6. Ex. 2 Find the areas of sectors
Find the areas of the sectors formed by <PQR.

7. Ex. 3 Use the Area of a Sector Theorem
Use the diagram to find the area of Circle Y.

8. Guided Practice #4-5, p. 231
Find the areas of the Find the area of Circle H.
sectors from by <ABC.

9. Homework
See Agenda