1.

ABC and DBC are two isosceles triangles on the same base BC.Show that angle ABD=angle ACD​

Answer»

Step-by-step explanation:

∠ABD = ∠ABC + ∠CBD

∠ACD = ∠ACB + DCB

Both the triangles are ISOSCELES, so the ANGLES FORMING at the BASE would be equal.

So if ∠ABC = ∠ACB and ∠DBC = ∠BCD, the sum of ∠ABC + ∠DBC would be equal to the sum of ∠ACD and ∠BCD.

Hence, proved.



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