Triangle Division and Relationships

There are multiple types of triangles, but what is most important is to know what to remember about each type.

Here are some of the types:
Acute triangle - 3 acute angles
Equiangular Triangle - 3 congruent acute angles
Right Triangle - One right angle
Obtuse Triangle - One obtuse angle

Other things to note:
Equilateral Triangle - 3 congruent sides
Isosceles Triangle - at least 2 congruent sides
Scalene Triangle - No congruent sides

Other things to remember about triangles:
*NOTE, this symbol (<) is synonymous with angle
and this symbol (*) is synonymous with degrees
Triangle sum theorem: m
Acute angles of a right triangle are complementary.

The measure of each angle of an equiangular triangle is 60*

The measure of an exterior angle of a triangle is equal to the sum of the measures of its remote interior angles.

If 2 angles of one triangle are congruent to two angles of another triangle, then the third pair of angles are congruent.


DON'T FORGET ABOUT
- SSS
- SAS
- ASA
- AAS
- HL
and CPCTC

THINGS TO NOTE:










Holt Geometry Book