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欧几里得对于角角边（AAS）全等的证明

Illustrated · 1 min

By Neil Chowdhury
Two triangles ABC and FED with matching angles at A and F and at B and D, and equal sides AB and FD. A second diagram adds a point G on AC with AG equal to FE for the proof.

After you prove ASA, it is simple to prove AAS.

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