Question

P lies in the interior of angle BAC.If angle BAC=70 and BAP=42 determine the measure PAC

Answer 1

bac = 70 
bap = 42
pac = bac - bap
      = 70- 42 
      = 28

Answer 2

∠bac = 70 
∠bap = 42
∠pac = ∠bac -∠ bap
  ∠pac= 70- 42 
  ∠pac= 28