Download The ABC`S OF GEOMETRY

The ABC’S OF
GEOMETRY
BY:
JAMES BOWIE AND
JUSTIN SCUTT
ACUTE ANGLE


An acute angle is always less than 90 degrees.
Base

Base is the lowest part or edge of something, especially the part on which
it rests or is supported.
Correspondent angle

The angles in matching corners are called Corresponding Angles
Diamerter

Diameter line segment (or length) joining two points on a circles
circumference and passes through the circle's center (twice the length of
the radius)
Exponent
•
Exponent
An exponent is a small number written with another big
number that tells how many times to multiply the big
number by itself.
Formula

a mathematical relationship or rule expressed in symbols.
chemical formulas.a fixed form of words, especially one
used in particular contexts or as a conventional usage.
Geometry

the branch of mathematics concerned with the properties and
relations of points, lines, surfaces, solids, and higher
dimensional analogs.
Hypotenuse

the longest side of a right triangle, opposite the right angle
Isosceles Triangle

a triangle with two equal sides
Adjacent

having a common vertex and a common side.
skew

skew lines are two lines that do not intersect and are not
parallel.
Line

A long thin mark made by a pen, pencil, etc.
In geometry a line:
· is straight (no curves),
· has no thickness, and
· extends in both directions without end (infinitely).
Midpoint

Midpoint of a line segment is the point
that is halfway between the endpoints of
the line segment.
Number line

A line representing the set of all real numbers. The number
line is typically marked showing integer values.
Ordered pair
Two numbers written in a certain order.
 Usually written in parentheses like this: (4,5)


PI
Pi is a name given to the ratio of the
circumference of a circle to the diameter.
That means, for any circle, you can divide
the circumference (the distance around
the circle) by the diameter and always get
exactly the same number. It doesn't
matter how big or small the circle is, Pi
remains the same. Pi is often written using
the symbol and is pronounced "pie", just
like the dessert.
Quadrilaterals

Quadrilateral just means "four sides" (quad means four,
lateral means side).Any four-sided shape is a
Quadrilateral. But the sides have to be straight, and it
has to be 2-dimensional.
Radius

The distance from the center to the edge of a circle
It is half of the circle's diameter.
Septagon

A 7-sided polygon (a flat shape with straight sides).
(Also called Heptagon)
Triangle
A basic three sided shape.
Undefined Slope

A vertical line has undefined slope because all points on
the line have the same x-coordinate. As a result
the formula used for slope has a denominator of 0, which
makes the slope undefined.
Vertical Angle

Vertical in this case means they share the same
Vertex (corner point), not the usual meaning of up-down.
width

the measurement or extent of something from side to side.
X-coordinante

The horizontal value in a pair of coordinates. How
far along the point is.
Always written first in an ordered pair of coordinates
(x,y), such as (12,5).
Y-axis

the secondary or vertical axis of a system of coordinates,
points along which have a value of zero for all other
coordinates.
Zero

no quantity or number; naught; the figure
0.