Presentation on theme: "Thee-Dimensional Figures and their representations"— Presentation transcript:
1 Thee-Dimensional Figures and their representations Chapter 1.7 and 12.1Thee-Dimensional Figures and their representations
2 VocabularyPolyhedron – a solid with all flat surfaces that enclose a single region of spaceFace – each flat surface of a polyhedronEdges – the line segments where faces intersectVertex – the point where three or more edges intersect
11 Cross SectionA cross section is the intersection of a solid and a plane
12 Identify Cross Sections of Solids Example 3BAKERY A customer ordered a two-layer sheet cake. Determine the shape of each cross section of the cake below.
13 Example 3A solid cone is going to be sliced so that the resulting flat portion can be dipped in paint and used to make prints of different shapes. How should the cone be sliced to make prints in the shape of a triangle?A. Cut the cone parallel to the base.B. Cut the cone perpendicular to the base through the vertex of the cone.C. Cut the cone perpendicular to the base, but not through the vertex.D. Cut the cone at an angle to the base.