ঘুড়ির ঘোরপ্যাঁচ

$ABCD$ একটা ঘুড়ি। $AB = BC,AD = DC = BD = AC$ হলে $\angle ABC = ?$

Geometry Angle Chasing

7 Upvotes 3 Downvotes

Attempt 900

Solve 531

First Solve saad_trig