If someone can help me out I’d appreciate it

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2 = 1 and x^2/8^2-y^2/6^2 the foci of both graphs are the same points. the lengths of both transverse axes are the same. the directrices of = 1 are horizontal while the directrices of = 1 are vertical. the vertices of = 1 are on the y-axis while the vertices of = 1 are on the x-axis.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees