---
Created: 2024/10/25 15:12
---
# Straight lines (Lec 01 - 05)

- [x] Change of axis
- [x] Rotation of axis
- [x] Pair of straight lines (perpendicular)
- [x] Bisection
- [x] Pair of straight lines (parallel)

# Conics

- [ ] Definition and overview
- [x] Find props of parabola, hyperbola, and ellipse
- [x] Find coordinates of center and equation when referred to center as origin

# Circle

- [x] Orthogonal circle
- [x] Radical axis
- [x] Pole and polar
- [x] Coaxial system - limiting points

# Plane

- [x] Equation formation
- [x] Angle between two planes
- [x] Interception
- [x] Perpendicular distance of a point
- [x] Coplanar line
- [x] Shortest distance

# Solid geometry

- [ ] Direction cosine of a line
- [ ] Direction ratio
- [x] Angle between two lines
- [ ] Relation between projection and direction cosine
- [x] Equation of lines in 3D