This handy reference chart shows 9 basic angles in geometry (acute, right, obtuse, straight, reflex, adjacent, complementary, supplementary and vertical) with definitions and illustrations for each. It also has a handy sidebar that tells the definitions of an angle, parts of an angle, and degrees. The Types of Angles Poster is a must have for any middle or high school geometry class. It's a great resource for homeschooling too! Printed with vivid colors printed on high quality (100#) paper. Manufactured with double sided 3 mil thick encapsulated lamination and sealed on all sides to protect against dirt, dust, moisture and humidity. Each poster measures 17 inches x 22 inches. Large fonts and crisp graphics for easy readability. All of our posters are printed in the USA and shipped in sturdy cardboard tubes.