A full rotation is 360 degrees so the required angle is 360/12 = 30 degrees.
Well the formula for a triangle is base(b) times height(h) divided by 2.
X57 I think no just doing this for points so made a random number lol
Easy it's like regular subtraction
-2 -2=-4 if it's the same sign you add
-2+4=2 different is subtract
1/5 because there are 7 numbers divisible by 5 from 1 to 35. 5,10, 15, 20,25,30,35, and out of those there are 35 cards, 7 out of 35 or 7/5 can be simplified to 1/5.