Adjacent Angles - Quiz Question Title * 1. What makes two angles adjacent? They add up to 180° They share a vertex but not a side They are side by side, share a vertex and a side, and don't overlap They face each other when lines cross Question Title * 2. Which of these angle pairs is never adjacent? Complementary angles Vertical angles Supplementary angles Angles on a straight line Question Title * 3. Can two angles be both adjacent and complementary? Yes, always No, never Only if they are supplementary too Yes, if they add up to 90° and share a side Question Title * 4. Why are angles 1 and 2 in the diagram not adjacent? They don’t add up to 180° They overlap They share a vertex but not a side They are both right angles Done