sector and diameter
posted by kevin .
Find the area of a sectorwith a central angle 0f 190degree and a diameter of 5.1cm.
Can someone please help?

Ac = pi*r^2 = 3.14*(5.1/2)^2 20.42 cm^2
= Area of circle.
As = (190/360)*20.42 = 10.78 cm^2. = Area of sector.