Question

The measure of <1 is:
570.
620.
119.
None of these choices are correct.

Answer 1

Because the base of the triangle is a straight line, it has an angle measure of 180.° Therefore, we can form an equation to find the measure of angle 1:

57+m∠1=190

Solve for m∠1:

Subtract 57 from both sides:

m∠1=180-57

m∠1=123°

So, none of the choices are correct