Educational reference chart – This colorful geometry poster illustrates nine basic types of angles: acute, right, obtuse, straight, reflex, adjacent, complementary, supplementary, and vertical. Each type is clearly defined and paired with a visual example. A helpful sidebar also explains what an angle is, the parts of an angle, and how degrees are used to measure them. A must-have resource – Perfect for middle and high school geometry classrooms, as well as homeschool and tutoring...