Introduction to Geometry

A full course in challenging geometry for students in grades 7-10, including topics such as similar triangles, congruent triangles, quadrilaterals, polygons, circles, funky areas, power of a point, three-dimensional geometry, transformations, introductory trigonometry, and more.
The Version is crawled from the web digital version on the AoPS's official website, thus it is not a standard PDF file, rather a joint of screenshots of the websites.