1. Warm Up # 4 Classify and name each angle. 1 ab c d

2. Types of Triangles

3. Vocabulary Congruent means the same length. A triangle is a figure formed by three line segments that intersect only at their endpoints.

4. Classifying Triangles by Sides Scalene Triangle- no congruent sides of the triangle Isosceles Triangle- at least two congruent sides of the triangle Equilateral Triangle- All three sides of the triangle are congruent.

5. Classifying Triangles by Angles Acute Triangle- All three angles of the triangle are acute. Obtuse Triangle- One angle in the triangle is obtuse. Right Triangle- One angle in the triangle is a right angle.

6. Examples: Draw the following triangles. If not possible explain why? 1.Right isosceles triangle 2. Obtuse equilateral triangle

7. Examples: Draw the following triangles. If not possible explain why? 3. Obtuse scalene triangle 4. Right scalene triangle

8. Examples: Draw the following triangles. If not possible explain why? 5. Right Acute Triangle 6. Right Equilateral Triangle

9. Examples: Draw the following triangles. If not possible explain why? 7. Acute Equilateral Triangle 8. Acute Scalene Triangle

10. Homework Classifying Triangles Worksheet