Area of Two Triangles in a Trapezoid

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Area of Triangle AED and Triangle BEC are equal when trapezoid ABCD is split into four triangles by its diagonals.

Expressions

Name Input
BEC Derive Input Maple Input MathML Input Mathematica Input Maxima Input Mupad Input TI-Nspire Input text Input Image
AED Derive Input Maple Input MathML Input Mathematica Input Maxima Input Mupad Input TI-Nspire Input text Input Image