In the adjoining figure, two exterior angles of a triangle are 135 and 120 degree . Find the measures of angle P
135+a=180 (linear pair)
a= 180-135
a=45
120+b=180 (linear pair)
b=180-120
b=60
a+b+P=180 (sum of all interior angles of a triangle is 180)
45+60+P=180
105+P=180
P=180-105
P=75
a= 180-135
a=45
120+b=180 (linear pair)
b=180-120
b=60
a+b+P=180 (sum of all interior angles of a triangle is 180)
45+60+P=180
105+P=180
P=180-105
P=75
