Need help with this question

Me! #1 write an equation for the interior angles of this triangle that uses the triangle sum theorem. #2 what is the value of x? #3 what is the measure of #4 classify the triangle above as acute, obtuse, or right. state your reason in a complete sentence.

In trapezoid bath, ah=19.7 and et=16.1. identify be.

Use set buikder notation to represent the following set: {, -2, -1, 0}