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.
63 degrees because 180 -39 -78 = 63
48 degrees is an acute angle.