What are those 13 kinds of angles?

Answer 1

The 13 kinds of angles typically refer to various classifications based on their measures. These include acute angles (less than 90°), right angles (exactly 90°), obtuse angles (greater than 90° but less than 180°), straight angles (exactly 180°), reflex angles (greater than 180° but less than 360°), and full angles (exactly 360°). Additional classifications can include complementary angles (sum to 90°), supplementary angles (sum to 180°), adjacent angles (share a common side), vertical angles (opposite angles formed by intersecting lines), and alternate interior/exterior angles (formed by a transversal crossing parallel lines).