If ABD is a line segment then it is known that angle form by a line segment is 180

ABC is a triangle whose measurements are;

Angle ABC=55

Angle ACD=90

Angle CAB= 180-55-90 sum of angles of triangle is 180

Angle A=35

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^{o}. If a line CB makes an angle CBD with AC and its measurement is 125^{o}then the measurement of the other angle ABC will be 55^{o}.ABC is a triangle whose measurements are;

Angle ABC=55

^{o}Angle ACD=90

^{o }as lines AC and CB are perpendicularAngle CAB= 180-55-90 sum of angles of triangle is 180

Angle A=35

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