I use it as a short way to say "okay" but I don't know how others may use it.
The sum of 10 and a subtraction of 4 from 6.
Answer:
No.C(The curve would remain same size but would be flipped upside down.)
Answer:
tam 20 = 4 / x
x = 4 /tan 20 = 4 / .364 = 10.99
