To classify triangles by their sides, we need to understand the definitions of each type:
- Equilateral Triangle: All three sides are equal.
- Isosceles Triangle: Two sides are of equal length, while the third side is different.
- Scalene Triangle: All three sides are of different lengths.
Now, let's classify the triangles provided in your examples:
- 7cm, 3cm, 9cm: All sides are of different lengths, so this triangle is Scalene.
- 5, e, f: Assuming e and f are not equal to 5 (depending on their actual values), this triangle could be either Isosceles (if e or f equals 5) or Scalene (if all sides are different).
- e, d, f: Again, without specific values for e, d, and f, we cannot classify definitively. If e = d and both are not equal to f, it's Isosceles; if all three are different, then it's Scalene.
Since values for e, d, and f are not specified, please provide them in order to classify accurately.
However, based on the provided information, here’s how you can categorize:
- Equilateral: (None here)
- Isosceles: (Based on the values of e, d, and f, if applicable)
- Scalene: 7cm, 3cm, 9cm, and possibly others if e, d, and f are all different.
Please confirm or provide the values for e, d, and f for a complete classification.