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题吧，智能辅助学习中心
1. Solute the equation[解方程]
2. Prove that [证明]
3.Show how to describe a triangle having given its angles and its perimeter
己知三角形三角及周长,解此三角形.
4. Given the edge of a tetrahedron, find its height and volume.
[已知正四面体棱长,求其高及体积.]