Question

ABC and DBC are two isosceles triangles on the same base BC. Show that
LABD = ZACD.
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Answer 1

Answer:

ABC is an isosceles triangle then

angle ABC = angle ACB = x degree

BCD is an isosceles triangle then

angle CBD = BCD = y degree

angle ABD = x + y

angle ACD = x + y

angle ABD = angle ACD