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Setler79 [48]
3 years ago
6

Pleaaasse explain:)))

Mathematics
2 answers:
vagabundo [1.1K]3 years ago
7 0
Remember alternative interior angles... so angle BDC is 20°  and angle BDA is 30<span>° 

This means that the side lengths are equal

Hope this helps ;)</span>
nikitadnepr [17]3 years ago
5 0
The first one is correct.
DC=AC
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