Mohr’s Theorem I: The angle between the two tangents drawn on the elastic line is equal to the area of the Bending Moment Diagram between those two points divided by flexural rigidity.
θ=
[Area‌of‌bending‌moment‌diagram]
EI
Mohr’s Theorem II: The deviation of a point away from the tangent drawn from the other point is given by the moment of area of bending moment diagram about the first point divided by flexural rigidity. δ=BB‌=