WOLFRAM
|
DEMONSTRATIONS PROJECT
Two Midpoints of a Trapezoid
D
D
N
≈
1
.
2
6
N
E
≈
1
.
2
6
A
M
≈
4
.
1
9
M
C
≈
4
.
1
9
L
e
t
A
B
C
b
e
a
t
r
i
a
n
g
l
e
.
L
e
t
D
b
e
a
p
o
i
n
t
o
n
A
B
a
n
d
D
E
b
e
p
a
r
a
l
l
e
l
t
o
A
C
w
i
t
h
E
o
n
B
C
.
L
e
t
A
E
a
n
d
D
C
i
n
t
e
r
s
e
c
t
a
t
F
.
L
e
t
B
F
i
n
t
e
r
s
e
c
t
D
E
a
t
N
a
n
d
A
C
a
t
M
.
T
h
e
n
D
N
=
N
E
a
n
d
A
M
=
M
C
.