### Angle

Finding the angle between two lines whose equations are in intercept form.

### Triangle Area

Finding the area of a triangle in terms of polar coordinates of its three vertices.

### Oblique Axes

Angles on a modified coordinate plane.

### Rectangular Axes

Transforming from one set of rectangular axes to another with the same origin, but different direction.

### Particular Cases

An inscribed triangle in a circle.

### Circle

A circle and triangle situated on coordinate planes.

### Common Form of Circle

A circle in its common, or central form. This is used to assist students in finding the equation of…

### Rectangular Coordinates

Changing from polar to rectangular coordinates.

### Perpendicular Distance

Finding the perpendicular distance of points whose equation is x cosa + y sina = p.

### Chord Equation

Tangent lines are drawn from a given external point to a circle. The equation is found by joining their…

### Circle Equation

Finding the equation of a circle with the origin as its center.

### Line Equation

Finding the equation of a line through two given points.

### Normal Equation

Finding the equation of the normal at any point on a circle.

### Line Equations

Other forms of line equations.

### General Form

A line with a standard form equation.

### Intercept Form

A line with intercept form equation.

### Geometrical Plane

Geometrical plane.

### Geometry

Geometrical perspective drawing.

### Given Incline

Equation of a line with two given points and a given inclination.

### Straight Line

Equation of a straight line: a) parallel to y-axis, b) parallel to x-axis.

### Straight Line

A positive slope line making a 60 degree angle with the x-axis.

### Lines

A circle with many tangent and secant lines passing through it.

### Alternate Method

Another method for using perpendicular form.

### The Origin

A straight line through the origin of a coordinate plane.

### Alternate Form, Perpendicular Distance

An alternate form of the perpendicular distance method.

### Coordinate Plane

A circle with part of a triangle inscribed in it. They are lying on a coordinate plane.

### Given Point

Finding the equation of a line drawn through a given point at a given direction.

### Axes Shift

Any system of coordinate axes to another set which is parallel to the former, but with different origins.