Question

Find m angle ABC

m angle ABC = 41 deg

m angle ABC = 71 deg

m angle ABC = 83 deg

m angle ABC = 73 deg

Answer 1

The sum of the interior angles of a triangle is 180°

So,

2x - 9 + 2x + 1 + 24 = 180
Simplify
4x + 16 = 180
4x = 164
x = 41

Now that we have the value of x (41), we can find the measure of angle ABC

(2x + 1) = 82 + 1 = 83

Answer : m angle ABC = 83 deg