The two outer "strands" should be parallel and the rungs should be perpendicular to the strands.
Since you want to cancel something out, the book makes the 24 3 times eight so that both of the threes can be canceled out
Answer:
20-gon
Step-by-step explanation:
First we start with the formula to find what the sum of angles will be if we know the number of sides.
S=(n-2)*180 where S is the sum of angles and n is the number of sides.
Normally you'd plug in n to find S, but you can do the opposite too.
3240=(n-2)*180
Let me know if you need help working it from here.