WOLFRAM
|
DEMONSTRATIONS PROJECT
A Test for the Convexity of a Quadrilateral
T
h
i
s
D
e
m
o
n
s
t
r
a
t
i
o
n
d
r
a
w
s
t
h
e
q
u
a
d
r
i
l
a
t
e
r
a
l
g
r
e
e
n
i
f
c
o
n
v
e
x
,
o
r
a
n
g
e
i
f
c
o
n
c
a
v
e
,
a
n
d
r
e
d
i
f
r
e
f
l
e
x
.