HI, I drew & explained it below. I used the sine trig function to find the diagonal length and then used the pythagorean to find the missing length. Hope this helps :)
You need to add what the lines are if you want them to be analysed for you^^
It's impossible for 2 factors of 12 to add up to 16. So there would be no answer to that.
Answer:
1.53
Step-by-step explanation:
because 21 minus 19.47= 1.53