# MrAlanKoh

Joined 16 June 2022

Part time Matlab user

Part time AI art enthusiast

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The Nine Chapters Maths (Ancient China)

- "Problems of Arithmetic": This chapter covers basic arithmetic operations, including addition, subtraction, multiplication, and division, as well as problems involving fractions and decimals.
- "Problems of Algebra": This chapter covers problems involving equations and unknowns, including linear equations, quadratic equations, and systems of equations.
- "Problems of Rectangular Arrays": This chapter covers problems involving matrices and arrays of numbers, including solving systems of linear equations using matrices.
- "Problems of Right Angles": This chapter covers problems involving right triangles and the Pythagorean theorem.
- "Problems of Solids": This chapter covers problems involving geometric shapes, such as circles, spheres, and cylinders.
- "Problems of Proportions": This chapter covers problems involving ratios and proportions, including problems involving similar triangles.
- "Problems of Shading and Shadows": This chapter covers problems involving the measurement of shadows and the application of trigonometry.
- "Problems of the Circular Measurement of Areas": This chapter covers problems involving the measurement of areas, including problems involving circles and sectors.
- "Problems of the Measurement of Time": This chapter covers problems involving the measurement of time and the calculation of time intervals, including problems involving the sexagesimal system used in ancient China.