Answer:
135°
Step-by-step explanation:
WILD is a cyclic quadrilateral.
Opposite angles in a cyclic quadrilateral are Supplementary.
[tex] \therefore \angle \: I + \angle \: D = 180 \degree \\ \\ \therefore 45 \degree + \angle \: D = 180 \degree \\ \\ \therefore 45 \degree + \angle \: D = 180 \degree \\ \\ \therefore\angle \: D = 180 \degree - 45 \degree \\ \\ \huge \red{ \boxed{\therefore\angle \: D = 135 \degree }}[/tex]
