Answer:
Please find the complete question in the attached file.
Step-by-step explanation:
For point 1:
At this point we make up triangles for the first one makes up by 3 matches figure 2 make up by 5 matches figure 3 makes up by 7 matches.
For point 2:
you can try to
draw to find values
For point 3:
number of matches
For point 4:

Answer:
0, one solution
Step-by-step explanation:
The answer is 18.
If you multiple 3 x 3 x 2 you get 18 different ways to arrange the books
Answer:
72- no
36-yes
8- no
16- yes
81-yes
64-yes
48-no
Step-by-step explanation: