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Reteach 10-1 Reteach 10-1 Name Date Class Name Date Class LESSON Reteach LESSON Reteach 10-1 Solid Geometry 10-1 Solid Geometry continued Three-dimensional figures, An edge is the A net is a diagram of the surfaces of or solids, can have flat or segment where two a three-dimensional figure. It can be curved surfaces. faces intersect. folded to form the three-dimensional figure. Prisms and pyramids are Each flat named by the shapes of surface is A vertex is the point where The net at right has one rectangular their bases. called a face. The remaining faces are triangles, three or more faces intersect. In RECTANGULARPYRAMID face. a cone, it is where the curved and so the net forms a rectangular surface comes to a point. pyramid. NETOFRECTANGULARPYRAMID Solids Prisms Pyramids Cylinder Cone A cross section is the intersection of a three-dimensional figure and a plane. vertex bases bases bases base The cross triangular rectangular triangular rectangular Neither cylinders nor cones section is a prism prism pyramid pyramid have edges. triangle. Classify each figure. Name the vertices, edges, and bases. Describe the three-dimensional figure that can be made from the given net. 2 1. 2. ! 5. 6. 3 " 1 4 triangular pyramid; vertices: Q, R, cylinder; vertices: none; _ _ _ _ _ S, T ; edges: QR , QS, QT, RS, ST, edges: none; bases: ᭪A, ᭪B rectangular prism triangular pyramid _ TR ; base: ᭝QST Describe each cross section. 3. ' 4. , 7. 8. $ & ( # % - triangular prism; vertices: C, D, E, F, cone; vertex: M; edges: none; _ _ _ _ _ _ G, H; edges: CD , DE , EC , FG, GH , HF, base: ᭪L rectangle circle _ _ _ CF, DG, EH; bases: ᭝CDE, ᭝FGH Copyright © by Holt, Rinehart and Winston. Copyright © by Holt, Rinehart and Winston. All rights reserved. 6 Holt Geometry All rights reserved. 7 Holt Geometry Name Date Class LESSON Practice B 10-1 Solid Geometry Classify each figure. Name the vertices, edges, and bases. ' 9 1. 2. &% !$ : "# hexagonal pyramid cone vertices: A, B, C, D, E, F, and G vertices: Y _ _ _ _ _ edges: AB , BC , CD , DE , EF , edges: none _ _ _ _ _ _ _ FA , AG , BG , CG , DG , EG , FG base: hexagon ABCDEF base: ᭪Z Name the type of solid each object is and sketch an example. 3. a shoe box 4. a can of tuna rectangular prism cylinder Describe the three-dimensional figure that can be made from the given net. 5. 6. cylinder hexagonal prism 7. Two of the nets below make the same solid. Tell which one does not. III IIIIII Describe each cross section. 8. 9. circle rectangle 10. After completing Exercises 8 and 9, Lloyd makes a conjecture about the shape of any cross section parallel to the base of a solid. Write your own conjecture. Possible answer: If a cross section intersects a solid parallel to a base, then the cross section has the same shape as the base. Copyright © by Holt, Rinehart and Winston. All rights reserved. 4 Holt Geometry.
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