The answer depends on which angle is 39 degrees.
39
An angle of 181 degrees is a reflex angle.
21 An angle of 110 degrees is an obtuse angle.
48 degrees is an acute angle.
The answer depends on which angle is 39 degrees.
90-39 = 51 degrees
180-39-77 = 64 degrees
39
It is 51 degrees.
98 + 43 + 39 = 180 degreesTherefore the third angle is 39, as all angles must add up to 180 degrees.
An angle of 181 degrees is a reflex angle.
If they are the angles of a triangle then the missing angle is 116 degrees
21 An angle of 110 degrees is an obtuse angle.
That totals 180.
48 degrees is an acute angle.
112 degrees is an obtuse angle.