Carcass wrote:
The circle with center O below has radius
4. Find the following.
(a) Circumference of the circle
(b) Length of arc ABC
(c) Area of the shaded region
Attachment:
#GREexcercise The circle with center O below has radius 4.jpg
(a) Circumference of the circlecircumference = 2πr = 2π(
4) =
8π(b) Length of arc ABC Arc length = (central angle)/360° x circumference
= 40°/360° x 8π
= 1/9 x 8π
=
8π/9(c) Area of the shaded regionSector area = (central angle)/360° x area of circle
= (central angle)/360° x πr²
= 40°/360° x π
4²
= 1/9 x 16π
=
16π/9Cheers,
Brent
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Brent Hanneson - founder of Greenlight Test Prep