Triangle Classification Worksheet
A Grade 3 math worksheet to help students classify triangles by their sides and angles.
Includes
Standards
Topics
Triangle Classification
Name:
Date:
Score:
Read each question carefully and classify the triangles based on their sides and angles.
1. Which type of triangle has all three sides of equal length?
Scalene triangle
Isosceles triangle
Equilateral triangle
Right triangle
2. A triangle with one angle greater than 90 degrees is called a(n) triangle.
Acute
Obtuse
Right
Straight
3. A triangle with two sides of equal length is called an triangle.
4. A triangle with all three angles less than 90 degrees is called an triangle.
5. Look at the triangle below. Is it an acute, obtuse, or right triangle? How do you know?
6. Draw a scalene triangle in the box below.
7. An equilateral triangle is also an isosceles triangle.
True
False
8. All right triangles have two acute angles.
True
False
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