March 07, 2017

Geometry 7.9 Area of Circles & Sectors

Learning Target:I can evaluate the area of circles & sectors. [G.C.5]

Acircle = π r2

Area of a circle = π radius2

Area of a circle

** Remember to follow order of operations (do exponents before you multiply)

The diameter of a circle is 11cm. Find the area. 1.

2. The area of a circle is 158.3 yd2. What is the diameter?

Sector of a Circle

Area of sectorArea of circle

degrees in arc360˚

=

- A region bounded by 2 radii of the circle and their intercepted arc.

sector APB

3. Find the area of the sectors formed by ∠HJK.

H

˚

m

4. Find the area of ⨀C

March 07, 2017

5. Find the area of the shaded region.

6 ft

18 ft

Assignment:7.9 worksheet