Fill in the following blanks :
In every triangle, the sum of (interior) angles of triangle = . . . . right angles.

Answer

To solve the question, we need to fill in the blank regarding the sum of the interior angles of a triangle.

### Step-by-Step Solution:

1. **Understanding the Sum of Angles in a Triangle**:
- We know from geometry that the sum of the interior angles of any triangle is always 180 degrees.

2. **Relating Degrees to Right Angles**:
- A right angle is defined as 90 degrees. Therefore, we can express 180 degrees in terms of right angles.

3. **Calculating the Number of Right Angles**:
- Since 180 degrees is equal to 90 degrees + 90 degrees, we can write:
\[ 180 \text{ degrees} = 90 \text{ degrees} + 90 \text{ degrees} = 2 \times 90 \text{ degrees} \]
- This means that 180 degrees is equivalent to 2 right angles.

4. **Filling in the Blank**:
- Therefore, we can conclude that in every triangle, the sum of the interior angles is equal to 2 right angles.

### Final Answer:
In every triangle, the sum of (interior) angles of triangle = **2 right angles**.