# Geometry Ch. 12

## 23 terms

### prism

has base, lateral edges

end(s) of prism

### altitude

segment joining two base planes and perpendicular to both

### height

length of an altitude

### lateral face

face of a prism that is not a base

### lateral edge

adjacent lateral faces that intersect in parallel segments

### right prism

prism with lateral faces that are rectangles

slanted prism

lateral area

total area

### cube

rectangular solid with square faces

### pyramid

has one base and different numbers of lateral edges

top of a pyramid

### regular pyramids

base is a regular polygon
all lateral edges are congruent
all lateral faces are congruent isosceles triangles; height of a lateral face is the slant height of the pyramid
altitude meets base at its center

### slant height

height of a lateral face

regular cylinder

### similar solids

solids that have the same shape but not necessarily the same size

### ratio of corr perimeters is a : b; ratio of base areas and TA is a2 : b2; ratio of volumes is a3 : b3

If the scale factor of two similar solids is a : b, then

prism formulas

pyramid formulas

### 2 pi rh; 2 pi rh + 2B; bh

cylinder formulas

cone formulas

sphere formulas

Create Set