Classifying triangles worksheet focusing on identifying equilateral, isosceles, and scalene triangles by their side lengths.

Let’s go through each triangle one by one and decide if it’s equilateral, isosceles, or scalene based on its sides.

Remember:
- Equilateral: All 3 sides are the same length.
- Isosceles: Exactly 2 sides are the same length.
- Scalene: All 3 sides are different lengths.

We’ll look at each triangle carefully — even though we can’t measure with a ruler, we can compare side lengths visually (by how long they appear relative to each other).

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1a. Red triangle – looks like all 3 sides are different → Scalene

1b. Blue triangle – two sides look equal, one is shorter → Isosceles

1c. Blue triangle – all sides look different → Scalene

2a. Green triangle – all sides look different → Scalene

2b. Red triangle – two sides look equal (the slanted ones), base is shorter → Isosceles

2c. Green triangle – all sides look different → Scalene

3a. Blue triangle – two sides look equal (left and right), bottom is shorter → Isosceles

3b. Red triangle – all sides look different → Scalene

3c. Green triangle – all sides look different → Scalene

4a. Blue triangle – all sides look different → Scalene

4b. Green triangle – all sides look different → Scalene

4c. Red triangle – all sides look different → Scalene

Wait — let me double-check a few that might be tricky.

Looking again at 1b – yes, two sides seem equal.
2b – definitely isosceles.
3a – also clearly isosceles.

None of them look equilateral — none have all three sides obviously equal. That’s okay! Not every worksheet has all types.

So final classifications:

1a: Scalene
1b: Isosceles
1c: Scalene
2a: Scalene
2b: Isosceles
2c: Scalene
3a: Isosceles
3b: Scalene
3c: Scalene
4a: Scalene
4b: Scalene
4c: Scalene

Final Answer:
1a: Scalene
1b: Isosceles
1c: Scalene
2a: Scalene
2b: Isosceles
2c: Scalene
3a: Isosceles
3b: Scalene
3c: Scalene
4a: Scalene
4b: Scalene
4c: Scalene