The sides of a triangle have slopes 0, 1 and -1. Its angles are:

  1. 45^circ, 67.5^circ, 67.5^circ
  2. 60^circ, 60^circ, 60^circ
  3. 45^circ, 45^circ, 90^circ
  4. 30^circ, 60^circ, 90^circ
Answer

C) 45^circ, 45^circ, 90^circ

Slopes 1 and -1 are perpendicular (1 -1 = -1); each makes 45^circ with the horizontal side. SLO M-09-B-12 · Knowledge

Mathematics MCQ · More Angle Between Lines MCQs · Practise