To help with your odyssey, the ancient Greek god Hermes delivers you a watch that has been set to the local time at Greenwich, which is located on the Prime Meridian. You see that the time (in Greenwich) is midnight and that the date is September 21, the autumn equinox. What value of right ascension is directly overhead Greenwich right now? Explain.

if triangle abc is congruent to triangle def, their interior angles are congruent, because congruent parts of congruent triangles are congruent (cpctc).

that means ∠d is congruent to ∠a; ∠d is equal to 8x - 2.

interior angles of all triangles add to equal 180 degrees, so you can set the sum of these interior angle values equal to 180 and solve for x.

180 = (8x - 2) + 22 + 72

180 = 8x - 2 + 22 + 72

180 = 8x + 92

88 = 8x

11 = x

x = 11