The correct answer is Choice B: 720.
To solve this, you have to use the Fundamental Counting Principal. You find the total number of options for each of the digits, then multiply them together.
For the first one, there are 10 options, then 9 options and finally 8 options.
10 x 9 x 8 = 720
I did this in my math the other day and the answer is octagon
i think of it as this 'the more angles there are the larger the angles'
i hope i helped

That's my answer Brainliest me!
Step-by-step explanation:
sinx = a/b
tanx= a/c
cosx= c/b