1. 08-Jul-09 SBT 1
A
B
C
F
V
E
1 2 3 5 6
1’
2’
3’
4’
5’
6’
P1
P2
P2’
P3
P3’
P4
P4’
P5
P5’
P6
P6’
G
V’
7
P7
P7’
45˚
Directrix
T
Tangent
Normal
7’
P
4
Ellipse
P1’
4. 4
Ellipse: Concentric Circle Method
R
S
A B
C
O
T
V
P
30˚
U
60˚
1
3
4
5
6
7
10
11
12
1’
2’
3’
4’
5’
8’
10’
11’
12’
P2
P3
P4 P5
P10
P11
P12
P1
P6
P7
P8
8
7’
P9
9’
9
2
Q
6’
D
9. 08-Jul-09 SBT 9
A
B
C
V F
50
1 3 4 5 6
2
P1
P2
P3
P4
P5
P6
P1’
P2’
P3’
P4’
P5’
P6’
T
Tangent
Normal
P
Directrix
10. 08-Jul-09 10
1 2 3 4 5 6
7
8
9
1’
2’
3’
4’
5’
6’
7’
8’
9’
P6
P7
P8
P9
30
50
O
B
A
Asymtode
Asymtode
Rectangular Hyperbola
Axis
V
I
J
F
K
L
Directrix
E
Eccentricity, e = VF/VE
Because asymptodes
are perpendicular to
each other
P1
P2
P3
P4
P5