Last updated at Dec. 8, 2016 by Teachoo

Transcript

Ex 12.2, 14 Tick the correct answer in the following : Area of a sector of angle p (in degrees) of a circle with radius R is (A) /180 2 R (B) /180 R2 (C) /360 2 R (D) /720 2 R2 Area of a sector = /360 2 Where = angle , r = radius of circle Here, we have = p and radius = R Putting these values in formula Area of sector = /360 2 = /360 2 But , these is no such option which is matching with answers So, multiply 2 in numerator and denominator Area of sector = /360 R2 2/2 = /720 2 R2 Hence, option (D) is correct

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.