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Unit 23 Geometry of Solids What is a A solid formed by polygons. polyhedron? How do we It is classified by the number of faces! name a polyhedron? What is a A polyhedron whose faces are enclosed by congruent regular regular polygons. polyhedron? What is a face? The flat polygonal surface. What is an edge? A segment where two faces intersect. What is a vertex? The point of intersec<on of three or more edges. What is a prism? A polyhedron with bases that are congruent. What is a right A prism whose lateral faces are rectangles. prism? What is a Parallelograms that connect the corresponding sides of lateral face? the bases. What is the Any perpendicular segment from one base to the other al<tude? base. What is a Where the lateral faces meet. lateral edge? What is the The length of the al<tude. height? How do we name a prism? It is classified by their base! What is an oblique prism? A prism that is not a right prism (slanted). 1
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What is a pyramid? A polyhedron that has only one base and triangular lateral faces that share a common vertex. What is a cylinder? One solid with a curved surface and two circular bases. What is the The segment connec<ng the axis? centers of the bases. What is the The radius of the circular base. radius? How do we name a pyramid? What is a cone? They are classified by their base too! A solid with a curved surface, a base, and a vertex. What is a right When the axis of a cylinder is perpendicular to the cylinder? bases. What is an oblique cylinder? A cylinder that is not a right cylinder (slanted). What is a sphere? The set of all points in space at a given distance from a given point. You can think of a sphere as a three-­‐
dimensional circle. What is the The given distance. radius of the sphere? What is a right When the line segment connec<ng the vertex of a cone cone? with the center of its base is perpendicular to the base. What is a A cone that is not a right cone (slanted). oblique cone? What is the The given point. center of the sphere? What is the Half of the sphere and its hemisphere? circular base. What is an The circle that encloses the great circle? base of a hemisphere. 2