Triangles

1. Types of Triangles

1.1. Equilateral

1.1.1. has three equal sides

1.1.2. has three equal angles

1.2. Isosceles

1.2.1. two equal sides

1.2.2. two equal angles

1.3. Scalene

1.3.1. no equal sides

1.3.2. no equal angles

2. Types of Angles

2.1. Acute

2.1.1. all angles are less that 90 degrees

2.2. Right

2.2.1. has an angle that is equal to 90 degrees

2.3. Obtuse

2.3.1. has an angle greater than 90 degrees

3. Formulas

3.1. Area

3.1.1. A=1/2bh

3.1.1.1. h=height

3.1.1.2. b= Base

3.2. Perimeter

3.2.1. A+B+C (add all sides together)

3.3. Pythagorean Theorem

3.3.1. a²+b²=c²

3.3.1.1. used to find the unknown quantity of a side