| A | B |
|---|
| surface area | perimeter * height, plus 2B |
| great circle | the cross section of a plane through the center of a sphere |
| base edge | b |
| area of a trapezoid | 0.5h(b1 + b2) |
| area of a triangle | 0.5*b*h |
| area of a parallelogram | b*h |
| area of a circle | pi * radius squared |
| circumference of a circle | 2 * pi * radius |
| radius | half the diameter |
| diameter | circumference divided by pi |
| cylinder | has 2 circular bases |
| cone | hs 1 circular base |
| lateral area | perimeter of the base * height of the prism |
| one third | ratio of volume between a cone and cylinder with equal base areas and heights |
| prism | poyhedron two parallel congruent bases |
| pyramid | polyhedron with one base |
| polyhedron | solid formed by polygons |
| sphere | a solid formed by all points equidistant from the center |
| tetrahedron | 4-sided Platonic solid |
| octahedron | 8-sided Platonic solid |
| platonic solid | all faces are congruent |
| face | any polygon in a polyhedron |
| icosahedron | 20-sided Platonic solid |
| dodecahedron | 12-sided Platonic solid |
| cube | 6-sided Platonic solid |
| hexagon | 6-sided polygon |
| pentagon | 5-sided polygon |
| oblique | lateral edges are NOT perpendicular to the base |
| perpendicular | what the edges must be to be used as height and base |
| perimeter | sum of the edges of the base surface |
| height | distance between the bases |
| volume | B*h or 1/3B*h |
| surface area | 2B + ph, or B + 1/21 pl |
| slant height | does NOT exist in any irregular pyramid |
| net | a 2-D representation of the faces of a solid |
| euler's theorem | f + v = 2 + e |
| lateral edges | connects the verticies of the bases to each other |
| right prism | lateral edges are perpendicular to the base |
| regular pyramid | the base edges are congruent |
| vertex | intersection of three or more edges |
| composite solid | a cone atop a cylinder |
| convex polyhedron | any two surface points can be connected by a line entirely inside the solid |
| cross section | intersection of a solid and a plane |
| hemisphere | half of a sphere |
| base area | B |
