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Harlamova29_29 [7]
3 years ago
14

Hey there! I would like some help please :) Thanks!

Mathematics
1 answer:
Alchen [17]3 years ago
3 0
AC is a common side, ∠ACD = ∠ACB and CD = BC   ⇒ ΔACD and ΔABC <span>are congruent (SAS definition).

</span>Congruent triangles have exactly the same three angles, so ∠D = ∠B.<span>

</span>
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