Choices:
A. Figure 1
B. Figure 2
C. Figure 3
D. Figure 4
Correct Answer: C
Solution:
Step 1: A polygon with seven sides is called a heptagon.
Step 2: A polygon with all its sides measuring the same is called a regular polygon.
Step 3: Among the choices, Choice C has all its seven sides of the same measure. So, it is a regular heptagon.