Geometry Figure Inequality Question

Question

Please disregard what I put for b, just looking for help, thanks.

Answer 1

a) m∠A>m∠1, so m∠A>m∠B, because ACB is isosceles (AC=BC and m∠1=m∠B).

b) m∠D>m∠B because ∠D is opposite the longer side AB.

c) m∠3=2m∠B (external angle of isosceles ∆ACB),

m∠D=m∠3=2m∠B (isosceles ∆ADC),

Therefore, m∠D>m∠B.