notes 11-5

11.5 Areas of Circles and Sectors
Th. 11.7: Area of a Circle= pi*r2
A sector of a circ is the region bound by 2 radii (a slice)

Th 11.8: Area of a sector: The ratio of the area A of a sector of a circ to the area of the circ is = to the ratio of the measure of the intercepted arc to 360.
(A / pi*r2 ) = ( m arc AB/ 360 )

16” pizza cut into 8 = slices, what is the area of 1 slice?

Square with sides of 10 inches with 4 circs inside, find the area of the shaded region

Inscribe a pentagon into a circ, find the m of the shaded region if the length of the radii is 8 ft

Prac ws 1-7