railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Geometry Triangles, Congruence and Similarity

A, D, C, B এবং E বিন্দুগুলি সমবৃত্তীয়, ∠AEC = 50° এবং ∠ABD = 30° হহলে ∠CBD-এর পরিমাপ (ডিগ্রীতে) কত?

1
15
2
30
3
20
4
10
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