This is a summary card for all the basic geometric knowledge students should have when entering High School Common Core Geometry. In my class I do a Pre-Geometry unit first thing in September to brush up on all of these skills the students have acquired in recent years. I also throw in some angle theorems and polygon rules to get the year rolling.
vocabulary - line, ray, line segment, angle
parallel lines (alternate interior angles, alternate exterior angles, corresponding angles)
polygons (triangle, quadrilateral, pentagon, hexagon, octagon, decagon)
sum of interior/exterior angles of a polygon
classifying triangles by sides and angles
exterior angle theorem
triangle inequality theorem