Answer:
Option (1) and (3) represents a net of a square based pyramid.
Explanation:
Given: Different diagrams.
We have to find which out of the given diagram represents a net of a square based pyramid.
Consider the general net that represents the square based pyramid (as shown in figure 1)
When we flip triangle 3 to left side, and triangle 2 to left side , we obtain diagram (3).
Also, when we flip triangle 1 on left side and triangle 3 on right side , we obtain diagram (1) .
Thus, Option (1) and (3) represents a net of a square based pyramid.