- problem
- find the tan(φ)
- maximum volume
- minimum perimeter
- the distance between two points
- minimum area (line)
- maximum area (angle)
- the three squares problem
- angle trisection
- a math trick-3
- double reflection
- find the area
- find the angle
- find the equation of the line
- find the slope
- find the function
- five squares
- square vs rhombus
- the famous "1/5" square
- the famous "1/7" triangle
- a square in a square
- an extrema problem-2
- an extrema problem-1
- an extrema problem-3
- equations and problems
- fractional exponents
- evaluating logarithms practice
- a math trick-31
