Please fool check it and explain how you got it - thank you!

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.

State if the two triangles are congruent. if they are, state how you know?

9/10 divide by -3/15 as a mixed number