Question

define two supplementary units of International System of units

Answer 1

Radian- A radian is the plane angle between two radii of a circle that cuts off an arc on the circumference equal in length to the radius.

Steradian-A steradian is the solid angle which, having its vertex in the centre of a sphere, cuts off an area of the surface of the sphere equal to that of a square with sides equal in length to the radius of the sphere.

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