3. Znayka knows that any triangle can be cut into 4 equal triangles. But does there exist a quadrilateral that can be cut into 7 equal triangles?
Answer: Yes.

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

![](https://cdn.mathpix.com/cropped/2024_05_06_21b93289ab9f0d96989eg-6.jpg?height=274&width=925&top_left_y=114&top_left_x=563)

Grading. 13 points for a correct example.