The ans should be ASA because angle AVR is equal to angle EVN (opposite angles equal)
If the slope is 5 perpendicular would be -1/5 just flip the slope around
The value of X is 35 because the angle 35 measures the same as the angle X, hence their values are the same
So just add 1/8 and 2/8. add 1 plus 2 and the denominator (bottom number) stays the same so you get 3/8 then subtract 8/8 minus 3/8 so just 8 minus 3 is 5 and the denominator stays the same so you end up with 5/8 so 5/8 of the book remains unread