Answer:
I believes it’s all of them due to it being a circle making any degree of rotation the same
Step-by-step explanation:
" the difference " means subtract
3(n - 7) = 18
3n - 21 = 18
3n = 18 + 21
3n = 39
n = 39/3
n = 13 <== ur number
The small triangle and big triangle are similar - this means they have the same angles. So, if you know the ratio of a side of the big triangle (12) to a side of the small triangle inside it (4), you know the ratio of the other sides. In this case, the side ratio (small to big triangle) is 1/3. Thus, the missing side length is 18/3=6.
Brainliest? ;D