Final answer:
The question addresses the properties of triangles and the triangle inequality theorem, specifically relating to the possibility of three numbers making up the side lengths of a triangle. It also references the Pythagorean theorem for right triangles and touches on concepts relevant to quadrilaterals.
Step-by-step explanation:
The question seems to be mixing different concepts, but the core of the question is about the properties of a triangle. To determine which set of three numbers could represent the side lengths of a triangle, one must apply the triangle inequality theorem. This theorem states that for any triangle, the sum of the lengths of any two sides must be greater than the length of the remaining side.
Additionally, the figures and principles mentioned relate to the geometry of triangles. The Pythagorean theorem is used in the context of right triangles, and states that the sum of the squares of the two legs (sides D and L) is equal to the square of the hypotenuse (s). This is relevant when assessing if the given sides can form a right triangle.
When a farmer calculates the fourth side D, they may use the fact that the sum of the angles in any quadrilateral on a flat plane is 360 degrees. However, for a triangle specifically, we know that the sum of all internal angles is 180 degrees, as stated in the provided reference material.