# PowerPoint Presentation

Document Sample

```					     Geometry Review:
0011 0010 1010 1101 0001 0100 1011

1
2
4
Basic Concepts of Shapes
While the Egyptians and Babylonians
0011 0010 1010 1101 0001 0100 1011

geometry, the Greeks created the

1
2
first formal mathematics of any kind
by organizing geometry with rules of

4
logic.
Geometry is a fundamental part of
mathematics. The word “geometry”
comes 0001 0100 1011
0011 0010 1010 1101 from the Greek words geo

meaning “earth” and metrein
meaning “to measure.”

1
2
4
Who Uses Geometry?
0011 0010 1010 1101 0001 0100 1011

•   Architects
•   Astronomers
•
•                                  1
2
Designers: Aeronautical, Graphics, etc.
Surveyors
•
•
Coast Guard
And many many more!

4
Basic Properties of Shapes
0011 0010 1010 1101 0001 0100 1011
• Polygon - an object with many sides.
Ex. Triangle, Rectangle, Pentagon, etc.
• All squares are rectangles, but not all
rectangles are squares.
1
2
• Triangles are rectangles cut diagonally
in half.

4
• The interior angles of a triangle are
180º.
Perimeter
x
0011 0010 1010 1101 0001 0100 1011

• The perimeter (P)
Y              Y
of a polygon is the
x                       sum of the side

1
2
P = Y +Y + X+X                lengths.
=2Y + 2X

4
• To the left are
A         B               some examples.

C
P=A+B+C
Area of an Object
0011 0010 1010 1101 0001 0100 1011
• The area (A) of a                               5
rectangle is found by               7
multiplying the length          A = 75 = 35

1
2
(l) by the height (h).
A = l h

4
• The area of a triangle is                4
half of a rectangle. We
use base (b) instead of             5
length.                          A = 45 = 10
A= b h                       2
2
Now Let’s Take The Quiz!
0011 0010 1010 1101 0001 0100 1011

1
2
4