8.0 cm
You would subtract 13 from 21 and you will get 8.
I am so sorry but I can’t see the question because if the glare on it
Answer:
C. 85.0 degrees. Because...
Coz when you calculate the angles all together using the 180°. You'll find the right answer
I got 5 times 45 because I multiplied by 5 to get my answer.