Printable primary math worksheet for math grades 1 to 6 based on ... - Free Printable

To solve this worksheet, we need to look at the side lengths of each triangle. Here is how to tell them apart:

* Equilateral Triangle: All 3 sides are the same length. It looks perfectly symmetrical.
* Isosceles Triangle: Exactly 2 sides are the same length. It often looks like a tall, narrow tent or a wide roof.
* Scalene Triangle: All 3 sides are different lengths. It looks "lopsided" or uneven.

Let's go through the triangles row by row, from left to right.

Row 1:
1. Left: All three sides look equal in length. → Equilateral
2. Middle: The top side and the right side look like they are the same length, but the bottom is different. → Isosceles
3. Right: This looks just like the first one; all sides appear equal. → Equilateral

Row 2:
4. Left: All three sides are clearly different lengths. One is short, one is medium, one is long. → Scalene
5. Middle: The two slanted sides look equal, making it symmetric. → Isosceles
6. Right: All sides are different lengths. It is very stretched out. → Scalene

Row 3:
7. Left: All sides are different lengths. → Scalene
8. Middle: This is an upside-down triangle where all sides look equal. → Equilateral
9. Right: All sides look equal here as well. → Equilateral

Row 4:
10. Left: All sides look equal. → Equilateral
11. Middle: All three sides are different lengths. → Scalene
12. Right: All three sides are different lengths. → Scalene

Final Answer:
Row 1: Equilateral, Isosceles, Equilateral
Row 2: Scalene, Isosceles, Scalene
Row 3: Scalene, Equilateral, Equilateral
Row 4: Equilateral, Scalene, Scalene