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To solve the problem of determining the percentage of white triangles in the pattern "Corak 4," let's analyze the Sierpiński triangle presented.

### Step-by-Step Breakdown:

1. **Pattern Explanation**: The triangle pattern shown is a fractal known as the Sierpiński triangle, where each larger triangle is divided into smaller triangles. The larger triangle in "Corak 4" is broken down into smaller orange and white triangles.

2. **Level of Division**: "Corak 4" refers to the 4th iteration of this fractal. Each subsequent iteration adds more subdivisions.

3. **Counting the Triangles**:
   - The number of smallest triangles at level 4 (Corak 4) is \(3^4 = 81\) (since each side length is divided into 3, and this happens across 4 levels).
   - Out of these 81 triangles, some are orange, and some are white.

4. **Number of White Triangles**:
   - The white triangles appear where no further subdivisions occur.
   - There are \(3^3 = 27\) white triangles at this stage. This can be calculated because each triangle is subdivided further, but a certain number remains unfilled.

5. **Percentage Calculation**:
   \[
   \text{Percentage of white triangles} = \left(\frac{\text{Number of white triangles}}{\text{Total number of triangles}}\right) \times 100
   \]
   \[
   \text{Percentage of white triangles} = \left(\frac{27}{81}\right) \times 100 = 33.33\%
   \]

6. **Correct Answer**:
   Among the given options, the closest percentage to 33.33% is **C. 33.9%**.

### Final Answer:
The correct answer is **C. 33.9%**.

Would you like further details on the process, or do you have any questions? Here are some additional related questions:

1. How is the number of triangles in each iteration of the Sierpiński triangle determined?
2. Why does the percentage of white triangles stabilize as the pattern iterations increase?
3. What would the percentage of white triangles be at "Corak 5"?
4. How does the structure of the Sierpiński triangle relate to geometric series?
5. Can the same method be used to determine the percentage of colored triangles if the color pattern changes?

**Tip:** In fractal geometry, percentages often stabilize as iterations increase because the fractal structure becomes self-similar and repeating.

Berapakah peratus segi tiga putih dalam Corak 4?

Learn how to calculate the percentage of white triangles in the 4th iteration of a Sierpiński triangle pattern (Corak 4). This problem involves fractal geometry and percentage calculation, suitable for students in Grades 10-12.

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