1. Two distinct angles with common vertex and common side is called.
2. Two angles whose sum of measures equals 90° is called .
3. Two angles whose measures have the sum of 180° is called.
4. Two nonadjacent angles formed by two intersecting lines is called.
5. Lines that never meet no matter how long they will be extended, denoted by the symbol "ll" is called.
Answers & Comments
1. Adjacent angles are two angles that have a common vertex and a common side but do not overlap. In the figure, ∠1 and ∠2 are adjacent angles. They share the same vertex and the same common side.
2. Two angles are called Complementary if their measures add to 90 degrees, and called supplementary if their measures add to 180 degrees.
3. Two angles are called Supplementary when their measures add up to 180 degrees.
4. Vertical angles — two non-adjacent angles formed by two intersecting lines.
5. Parallel lines are lines in a plane that are always the same distance apart. Parallel lines never intersect.