Math-Geometry (PACE 1081)
Area (Parallelogram)
A = b • h
Area (Triangle)
A = b • h / 2 (A = 1/2 bh)
Circle
A closed plane figure with all its points the same distance from the center.
Diameter
A line segment that passes through the center of a circle with end points that lie on the circle.
Chord
A line segment with endpoints that lie on a circle. It may or may not pass through the center of the circle.
Prism
A polyhedron with two bases.
Central Angle
An angle with its vertex at the center of the circle.
Radius
Any line segment that goes from the center of a circle to a point on that circle.
Polygon
Closed plane figure is made up of three or more line segments, which form their sides.
Edge
In a polyhedron, it is formed by the intersection of two faces.
Base
One of the two parallel and congruent faces on a polyhedron.
Arc
Part of a curved line of a circle.
What are the two ways to write pi?
Pi = 3.14 and Pi = 22/7
Radii
Plural of "radius"
the surface area of a triangular prism
SA =2A+PH
SA of rectangular prism
SA=2(lxw)+2(lxh)+2(WxH)
SA of square
SA=6s2
Circumference
The distance around a circle.
Perimeter
The distance around a figure or an object.
Area
The number of square units needed to cover a figure or surface.
Vertices
The points at which three or more edges intersect.
Perimeter (Regular Polygon)
The sum of all the side lengths.
Surface Area
The sum of the areas of all the faces of a prism.
Similar Polygons
Two polygons that have the same shape but not necessarily the same size.
circumference of a circle
c=3.14xd or 2x3.14r
Pyramid
A polyhedron with triangular faces that all meet at a vertex.
Polyhedron
A three-dimensional figure that has flat faces shaped like polygons
How many degrees are in a triangle?
180 degrees
Area (Circle)
A = 3.14 • radius2
Face
A flat surface shaped like a polygon.
