The three angles of a triangle add to 180 degrees. If two of them add to 140 degrees then the third must be 180 - 140 = 40 degrees.
Because the sum of the interior angles of a triangle must equal 180 degrees, the third angle must equal 180-80-60 = 40 degrees.
It must be 40 degrees. Because, the sum of internal angles should be 180 degrees. Accordingly, the third angle (C) = 180-(A+B) = 180 - (80+60) = 40 degrees
The answer will depend on which angle is 63 degrees, and the measurement units used for c.
5
The internal angles of a triangle add up to 180 degrees so in an equilateral triangel each internal angle must be 60 degrees, as 3 x 60 = 180.
An angle of 283 degrees is a reflex angle
Complement . . . another angle, of 53 degrees Supplement . . . another angle, of 143 degrees
3 and it will be an equilateral triangle
40 degrees
It is another right angle of 90 degrees because supplementary angles add up to 180 degrees.
77 degrees
The Right Angle.