GIVEN: CENTRAL ANGLE of 30° intercepts an arc of length 2 cmFormula Used: θ = arc / radius and 1o = πc / 180Calculation: USING the above formulae, we get θ = π / 6⇒ π / 6 = 2 / radius⇒ radius = 12 × 7 / 22 cm∴ required radius = 3.82 cm