Triangle Classification Worksheet
A worksheet for 4th graders to practice classifying triangles by their sides and angles.
Includes
Standards
Topics
Triangle Classification
Name:
Date:
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Read each question carefully and classify the triangles based on their sides and angles.
1. A triangle with all three sides of equal length is called:
Isosceles triangle
Scalene triangle
Equilateral triangle
Right triangle
2. A triangle with no sides of equal length is called:
Isosceles triangle
Scalene triangle
Equilateral triangle
Acute triangle
3. A triangle with one angle greater than 90 degrees is called an triangle.
4. A triangle with all angles less than 90 degrees is called an triangle.
5. A triangle with one angle exactly 90 degrees is called a triangle.
6. Look at the triangle below. Classify it by its sides and by its angles.
Classification by sides:
Classification by angles:
7. Look at the triangle below. Classify it by its sides and by its angles.
Classification by sides:
Classification by angles:
8. An equilateral triangle is also an isosceles triangle.
True
False
9. A right triangle can also be an obtuse triangle.
True
False