พื้นผิว 3D
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- Triangle angle theorem on a line
- Tricky Transformations Markese and Olivia
- การบวกจำนวนเต็มบวกกับจำนวนเต็มลบ
- Generating Elements of mesh modeling the surfaces of a Rhombicosidodecahedron-c(V=60) and its dual Solid: Deltoidal Hexecontahedron(V=62)
- Multiplying 2-Digit by 2-Digit Numbers Using an Area Model