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I. True or False. Write T if the statement is correct and F if the statement is wrong.
1. Sphere is generated by a circle revolving about one of each diameter.
2. Prism has two bases which are parallel equal polygon and three or more
lateral faces which are parallelogram.
3. Solids are figures bounded by plane surfaces.
4. Tetrahedron has 5 triangles.
5. Octahedron has 9 triangles.​