Printable activity: identify triangle types by sides

📐 Topic Summary

Triangles can be classified based on the lengths of their sides. An equilateral triangle has all three sides equal in length. An isosceles triangle has at least two sides equal in length. A scalene triangle has all three sides of different lengths. This printable activity will help you identify these triangle types.

📏 Part A: Vocabulary

Match the term with its definition:

1. Equilateral Triangle
2. Isosceles Triangle
3. Scalene Triangle
4. Side
5. Vertex

Definitions:

1. A triangle with all sides of different lengths.
2. A point where two or more line segments meet.
3. A triangle with at least two sides of equal length.
4. A line segment forming part of the outline of a shape.
5. A triangle with all three sides of equal length.

✍️ Part B: Fill in the Blanks

Complete the sentences using the words: equilateral, isosceles, scalene.

1. An ________ triangle has all three sides equal.
2. An ________ triangle has at least two sides equal.
3. A ________ triangle has all sides of different lengths.

🤔 Part C: Critical Thinking

Can a right triangle also be an isosceles triangle? Explain your answer.