The area of a circle is 72cm^2. Find the area of a sector of this circle that subtends a central angle of pi/6 rad. Thanks!
Follow Math Help Forum on Facebook and Google+
Originally Posted by Chinnie15 The area of a circle is 72cm^2. Find the area of a sector of this circle that subtends a central angle of pi/6 rad. Thanks! A whole circle may be considered to be a sector: From this you can find r and then find the area of the sector. Spoiler: Rearranging the equation to find r and then plugging that expression in provides a way to find A in one step Where: = Area of Sector = Area of Circle ( ) = Angle of Circle ( ) = Angle subtended by sector (
Hello Chinnie15 Originally Posted by Chinnie15 The area of a circle is 72cm^2. Find the area of a sector of this circle that subtends a central angle of pi/6 rad. Thanks! The whole circle ( ) subtends an angle of at the centre. The sector you want subtends an angle of which is of . So its area is ...? Grandad
I figured it out, thanks!
View Tag Cloud