1.

1Findlengthofanarcof a circle of radius 5 cm subtending an angle of 15° at the centre.

Answer»

length of arc of a cirle ia given be s = r∅where ∅ is in radian so , for 15° the radian is 15π/180 = π/12

so , arc length = (π/12)×5cm = 3.14*5/12 = 1.30cm.



Discussion

No Comment Found