Like this presentation? Why not share!

# Geometry journal 4

## by Katina1196 on May 14, 2011

• 923 views

### Views

Total Views
923
Views on SlideShare
923
Embed Views
0

Likes
0
19
0

No embeds

### Categories

Uploaded via SlideShare as Microsoft PowerPoint

## Geometry journal 4Presentation Transcript

• Geometry Journal 4
Katina Robles 9-3
• Types of Triangles
Equilateral: it is the triangle that all sides are the same.
Equiangular: it is the triangle that all angles are the same.
Isosceles: it is the triangle that has two equal sides only.
Scalene: it is the triangle that has no equal side
• Types of Triangles
Right Triangle: a triangle with only one right angle in it.
Acute Triangle: all angles are acute, less than 90 degrees
Obtuse Triangle: a triangle where one of the angles is obtuse.
• The Parts of a Triangle & Triangle Sum Theorem
A triangle has three angles and three sides.
The triangle sum theorem is that all angles sum up to 180 degrees.
=180
82
142
=180
8
19
90
19
60
=180
60
60
• Exterior Angles Theorem
The Exterior Angle always sums up to the two non adjacent sides.
60
45
60
120
135
90
100
130
30
• CPCT
Stands for Corresponding Parts of a Congruent Triangle.
This means that is two triangles are congruent, all the corresponding parts will also be congruent
1
4
A
D
Triangle ABC is congruent to triangle DEF. Therefore, all parts will also be congruent
3
5
2
6
C
F
E
B
Triangle 123 is congruent to triangle 456. Therefore, all parts will also be congruent.
d
b
a
Triangle abc is congruent to triangle def. Therefore, all parts will also be congruent.
c
e
f
• Side-Side-Side Postulate
SSS postulate: If two triangles have three congruent sides, the triangles are congruent.
• Angle-Angle-Side Postulate
If two angles and a non included side are congruent to the two angles and a non included side of another triangle then the two triangles are congruent.
• Angle-Side-Angle Postulate
If two angles and the side between them are congruent to the other triangle then the two angles are congruent.
• Side-Angle-Side Postulate
If two sides and the adjacent angle between them are congruent to the other triangle then those triangles are congruent.
• Picture Bibliography
http://www.mathwarehouse.com/geometry/congruent_triangles/angle-side-angle-postulate.php
http://www.mathwarehouse.com/geometry/congruent_triangles/angle-side-angle-postulate.php
http://www.icoachmath.com/math_dictionary/angle-angle-side_congruency.html
http://hotmath.com/hotmath_help/topics/ASA-postulate.html
http://ceemrr.com/Geometry1/Triangles1/Triangles17.html