Name two coplanar lines place the appropriate symbols over your answers​

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

I’m which figure is point g an orthocenter