double and half angle identities

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.

How many lines can be drawn through points j and k? 0 1 2 3

If g^-1(x) is the inverse of g (x) which statement must be true