What is common in the following figures (i) and (ii) (Fig. 2.36.)?

Is Fig. 2.36 (i) that of triangle? if not, why?

Question

What is common in the following figures (i) and (ii) (Fig. 2.36.)? Is Fig. 2.36 (i) that of triangle? if not, why?

Philoid · Accepted Answer

Both the figures have three lines segments.

Figure (i) is not a triangle because it is not a closed figure.

What is common in the following figures (i) and (ii) (Fig. 2.36.)?Is Fig. 2.36 (i) that of triangle? if not, why?