Math 8-9 Flashcards
Circumference
The distance around a circle
Pi
3.14 or 22/7
Composite figure
A figure made of simple geometric shapes
Face
a flat surface on a polyhedron
Edge
The line segment of which to faces on a polyhedron intersect
Polyhedron
A Three-dimensional shape where all surfaces or faces are flat
Vertex
On an angle or polygon the point where two lines intersect
Base
A side of a polygon
Prism
A polyhedron that has two congruent polygon shaped bases and other faces that are parallelograms
Pyramid
A polyhedron with one base and triangular faces that all meet at a common vertex
Sphere
A Three-dimensional shape with all points the same distance from the center
Cone
A 3-dimensional figure with one face and one vertex
Cylinder
A three-dimensional shape with two congruent circular bases connected by a curved lateral surface
Volume
The number of cubic units needed to fill a given space
Net
An arrangement of two-dimensional figures that can be folded to form a polyhedron
Surface area
The sum of the area of the faces of a 3-dimensional figure
Lateral face
A face of a pyramid or prism that is not a face
Lateral area
The sum of the areas of lateral faces of a prism or pyramid or the area of the lateral surfaces of a cylinder or cone
Perimeter
The distance around a polygon
Perimeter of a quad
P= 2L+2W
Circumference of a circle
C=3.14D OR C=3.14R2
Area of a circle
A=3.14Rsuared
