Answer:
m∠ABC = 75°
Explanation:
From the figure attached,
Three lines intersect each other at point B.
Angles formed at B are collinear.
By the property of collinear angles at a point,
Sum of all angles formed on a straight line at the point B = 180°
(3x - 6)° + (2x + 25)° + (x + 11)° = 180°
6x + 30 = 180
6x = 150
x = 25
Since, m∠ABC = (2x + 25)°
= (2×25) + 25
= 75°
Therefore, measure of angle ABC = 75° will be the answer.