1. Classifying Triangles
Subject: Geometry

2. Two Ways to Classify Triangles
By Their Sides
By Their Angles

3. Classifying Triangles By Their Sides
Scalene
Isosceles
Equilateral

4. Scalene Triangles
No sides are the same length

5. Isosceles Triangles
At least two sides are the same length

6. Equilateral Triangles
all sides are the same length

7. Classifying Triangles By Their Angles
Acute
Right
Obtuse

8. Acute triangles have three acute angles

9. Right Triangles
Right triangles have one right angle

10. Obtuse triangles have one obtuse angle

11. Classify this triangle.
Right Scalene

12. Classify this triangle.
Obtuse Isosceles

13. Classify this triangle.
Acute Scalene

14. Classify this triangle.
Acute Isosceles

15. Classify this triangle.
Obtuse Scalene

16. Classify this triangle.
Right Isosceles

17. The sum of the measures of any triangle is 180°.
Triangle Degrees
The sum of the measures of any triangle is 180°.
What is the measure of x?
70° x

18. The sum of the measures of any triangle is 180°.
Triangle Degrees
The sum of the measures of any triangle is 180°.
What is the measure of x?
45° x

19. The sum of the measures of any triangle is 180°.
Triangle Degrees
The sum of the measures of any triangle is 180°. x
What is the measure of x?
60°
50°