PLS HELP EASY ANGLES PLS HELP :)) MARKING BRAINLIEST PROMISE

Answer:
9p = 81 degrees
Step-by-step explanation:
All the angles in a triangle equal 180 degrees in total.
So the equation would be:
9p + 7p + 4p = 180
20p = 180
p = 9
So just plug it in:
9(9) 7(9) 4(9)
81 degrees 63 degrees 36 degrees