As per the question there are four congruent tringles and these congruency is that all sides are equal in length and size.
- The four triangles are ASA, AAS and HL.
- ∠BDA is equal to ∠BCD as given.
- In second, ST is parallel to UN and congruent to VU. That is also given.
- In the third statement the FH bisects the ∠EHG.
- FRH is congruent to FGH. Hence given.
Learn more about the PROVING TRIANGLES CONGRUENT: ASA AAS AND HL.
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