Question

pl answer fast
question 19 and 20

Answer 1

Answer of question 20::
Let the unknown angles be x and y.
Given they are complimentary. So x+y=90.
Also given that x-y=12.
Subtracting the second equation with first equation we get,
x+y-x+y=90-12
=>. 2y=78
=> y=39
Therefore x=90-39=51.