Congruent Diagonals in a Rectangle - Geometry Proof Diagram #1994611 (License: Personal Use)

This diagram shows rectangle ABCD with vertices labeled clockwise, and its two diagonals AC and DB drawn in red. The notation “AC ≅ DB” above confirms the diagonals are congruent, a fundamental theorem in Euclidean geometry. The image is sourced from Math Warehouse, a trusted educational resource.

Used in math education websites, textbooks, or lesson plans to illustrate the property that rectangles have congruent diagonals; supports user intent to understand or teach geometric proofs involving quadrilaterals.