Problem #WSP-000172

Problems Geometry Plane geometry Circles

Problem

Point $A$ is the centre of a circle. Points $B, C, D, E$ lie on the circumference of this circle. Lines $B C$ and $D E$ cross at $F$ . We label the angles $∠ B A D = δ$ and $∠ C A E = γ$ . Express the angle $D F B$ in terms of $γ$ and $δ$ .

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