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egoroff_w [7]
3 years ago
14

11.

Mathematics
1 answer:
Ksivusya [100]3 years ago
3 0

Answer:

Step-by-step explanation:

The two angles at E that are enclosed by DE and CE (<DEC) and AE and BE (AEB) are vertically opposite. Therefore you have 2 sides and an included angle.

The Postulate  is SAS

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