Question

10. ∆ABC and ∆DBC are both isosceles triangles on common
base BC such that A and D lie on the same side of BC. Prove that
∆ADB is congruence to ∆ADC. ✓BAC = 40° and ✓BDC = 100° find the measure of✓ABD
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Answer 1

this is the ans for da

Any doubt or confusion pls do ask

Answer 2

Answer:

10 degree is the correct answer