Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


Ex 11.1, 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) 𝑝/180 × 2πR (B) 𝑝/180 × πR2 (C) 𝑝/360 × 2πR (D) 𝑝/720 × 2πR2 Area of a sector = θ/360× 𝜋𝑟2 Where θ = angle , r = radius of circle Here, we have 𝛉 = p and radius = R Putting these values in formula Area of sector = 𝜃/360×𝜋𝑅2 = 𝒑/𝟑𝟔𝟎×𝝅𝑹𝟐 But , these is no such option which is matching with answers So, multiplying 2 in numerator and denominator Area of sector = 𝑝/360×πR2×2/2 = 𝒑/𝟕𝟐𝟎× 𝟐𝛑𝐑𝟐 So, the correct answer is (d)

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.