1. 4-1 Classifying Triangles
Classifying by Angles
Acute: 3 acute angles
Equiangular: 3 congruent acute angles
Obtuse: 1 obtuse angle
Right: 1 right angle
Classifying by Sides
Equilateral: 3 congruent sides
Isosceles: 2 congruent sides
Scalene: No congruent sides

2. Classifying Examples
Ex 1: Classify by angles
Ex 2: Classify by sides

3. More Classifying Examples
Ex 3: Classify by angles
Ex 4: Classify by sides

4. Using Algebra to Classify
Ex 5: Find y and the length of each side if △ABC is isosceles with AB = BC.

5. Classwork/Homework
P even