Circumferences & Areas of Circles

Circle information Defn: Points on a plane that are equidistant from a given point (CENTER). Radius: From center to point on the circle Diameter: 2 times the radius r d

Circle Circumference C = 2  r 5 in

Circle Circumference C = 2  r 5 in in

Circle Circumference C = 2  r 7cm

Circle Circumference C = 2  r 7cm cm

Circle Circumference C = 2  r 14’

Circle Circumference C = 2  r 14’ ft

Circle Circumference C = 2  r 6’

Circle Circumference C = 2  r 6’ 18.85’

Circle Area A =  r 2 5 in

Circle Area A =  r 2 5 in in 2

Circle Area A =  r 2 7cm

Circle Area A =  r 2 7cm cm 2

Circle Area A =  r 2 14’

Circle Area A =  r 2 14’ ft 2

Circle Area A =  r 2 6’

Circle Area A =  r 2 6’ ft 2

Circle Area Find the area of the shaded region. 5” 2”

Circle Area Area large – Area small = Area shaded 5” 2”

Circle Area Find the area of the shaded region. 6’ 3’

Circle Area Find the area of the shaded region. 3’