MATHS QUESTION

Question

OAB is a sector of a circle, centre O.

the radius of the circle is 15cm.

the angle of the sector is 30 degrees.

calculate the area of sector OAB.

Answer 1

A sector is a fraction of the area of the entire circle. You can find out what fraction by saying that your sector is 30 out of 360 degrees....which is 1/12 of the area of the entire circle.

 

Since your circle has a radius of 15 and the area formula is A= Π*r² , your circles area is 225Π and your sectors area is 1/12 of that.

 

Hope this helped