1. a straight line
2. a circle
3. an ellipse
4. a parabola
a circle
1. line
2. circle
3. pair of lines
4. none
circle
1. (1+√2, -2)
2. (1-√2, -2)
3. (1, -2+√2)
4. none
none
1. straight line
2. Pair of straight line
3. circle
4. none
circle
1. (5, 8)
2. (8, 5)
3. (8, -5)
4. (-8, 5)
(-8, 5)
1. 5
2. 1
3. 2
4. 3
3
1. 8
2. 4
3. 2
4. 1
8
1. 8
2. 4
3. 18
4. 6
6
1. (1, 1)
2. (-1, 1)
3. (-1, 2)
4. (-2, 2)
(-1, 1)
1. (5, -7)
2. (-1, 1)
3. (-1, 2)
4. (-2, 2)
(5, -7)