3. Znayka knows that any triangle can be cut into 4 equal triangles. But does there exist a quadrilateral that can be cut into 5 equal triangles?
Answer: Yes.

Solution. One of the possible options is shown in the figure.

![](https://cdn.mathpix.com/cropped/2024_05_06_21b93289ab9f0d96989eg-2.jpg?height=220&width=592&top_left_y=598&top_left_x=732)

Grading. 13 points for a correct example.