Which of the following are statements and which are not ? Give reasons for your answers.
The sum of all interior angles of a traingle is `180^(@)`.

Answer

To determine whether the given sentence is a statement or not, we will analyze the content of the sentence and provide reasoning for our conclusion.

### Step-by-Step Solution:

1. **Identify the Sentence**: The given sentence is "The sum of all interior angles of a triangle is 180 degrees."

2. **Definition of a Statement**: A statement is a declarative sentence that is either true or false, but not both.

3. **Analyze the Given Sentence**:
- The sentence asserts a fact about triangles: that the sum of the interior angles of any triangle is always 180 degrees.
- This is a well-known property in geometry.

4. **Truth Value of the Sentence**:
- We know from geometric principles that this property holds true for all triangles, regardless of their type (scalene, isosceles, or equilateral).
- Therefore, the statement can be verified and is universally accepted as true.

5. **Conclusion**: Since the sentence is a declarative statement that can be classified as true, we conclude that it is indeed a statement.

### Final Answer:
- The given sentence "The sum of all interior angles of a triangle is 180 degrees" **is a statement** because it is a declarative sentence that is always true.