Use the quadratic formula to solve for x.
2x² – 5x-1=0

Me #1 using vocabulary words, including the word “congruent”, state why the measure of angle d is 120 degrees. #2 what is the measure of angle e and why?

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.