Three angles of a triangle are cut off and lined up on the line below. A straight line. 2 lines form a V and come out of the line. The middle angle formed is 90 degrees, and the right angle is 45 degrees. Which statements describe the relationship of the angles in the triangle? Check all that apply. The sum of the three angles is 90°. The sum of the angles in the triangle is 180°. The three angles are adjacent and form a straight angle. The third angle is 45°. There is a pair of congruent angles.