A light wave is traveling (at an angle different from 90 degrees) from air to water. Which of these best describes what happens to the light wave as it enters the water?

Choose the correct answer.

The light wave will completely bounce off the water.

The light will bend as it enters the water from the air.

The light wave will continue to travel in a straight line.

The light wave will be completely absorbed by the water.

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