Question

The length of an arc of a circle of radius 1.5 cm which subtends an angle of 2 radian at the centre of the circle is:​

Answer 1

Answer:

the lenth of a ⭕⭕⭕⭕⭕⭕⭕⭕⭕ circel is 3;9

Answer 2

Solution :-

Basic Method :-

→ π radian = 180°

→ 1 radian = (180/π)°

→ 2 radian = (360/π)°

and,

→ Radius of circle = 1.5cm

then,

→ Length of arc = (Angle at centre/360°) * 2 * π * radius .

→ Length of arc = [(360/π)/360] * 2 * π * r

→ Length of arc = (1/π) * 2π * 1.5

→ Length of arc = 3 cm (Ans.)

Direct Formula :-

→ Length of arc = Angle at centre in radian * radius of circle

So,

→ Length of arc = 1 * 1.5

→ Length of arc = 3 cm (Ans.)

Learn more :-

the length of an arc of a circle of radius r which subtends an angle of 1 radian at the centre of the circle is

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