Quadrilateral
N
V
D
I
NVDI can be mapped onto Quadrilateral
F
L
S
W
FLSW by a reflection. If
m
∠
V
=
2
3
∘
m∠V=23
∘
and
m
∠
D
=
8
1
∘
m∠D=81
∘
, find
m
∠
S
m∠S.
