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Define the plane angle and solid angle عاصمة عمامe and solidaعمه​

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Answer:

A SOLID angle is a 3D angular volume that is defined ANALOGOUSLY to the definition of a PLANE angle in two dimensions. A plane angle, θ, made up of the lines from two points MEETING at a vertex, is defined by the arc length of a circle subtended by the lines and by the radius of that circle, as shown below.

Explanation:

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