Classifying Triangles Worksheet
Identify and classify different types of triangles based on their sides and angles.
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Classifying Triangles
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Read each question carefully and follow the instructions to classify the triangles.
Use the words below to complete the sentences.
1. A triangle with all three sides of equal length is called an triangle.
2. A triangle with two sides of equal length is called an triangle.
3. A triangle with no sides of equal length is called a triangle.
4. A triangle with one angle greater than 90 degrees is called an triangle.
5. A triangle with one angle exactly 90 degrees is called a triangle.
6. A triangle with all angles less than 90 degrees is called an triangle.
7. Look at the triangle below. Which type of triangle is it?
Scalene
Isosceles
Equilateral
Right
8. What kind of triangle has angles measuring 30°, 60°, and 90°?
Acute
Obtuse
Right
Equilateral
9. An isosceles triangle can also be a right triangle.
True
False
10. All equilateral triangles are also acute triangles.
True
False
11. Draw an obtuse isosceles triangle and label its equal sides.