Area Convex Quadrilateral Formula - Trigonometric Identities

Formula:

K =1/4√(2(A2+C2)-4X2)*(2(B2+D2)-4X2)sinθ


Where,
K = Area of convex Quadrilateral
A,B,C,D = sides
X= distance between the midpoints of the diagonals
Sinθ = the angle between the bimedians

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