This is Pack 1 (Triangles) from the AREA 6 Math and Physical Formulae Diagrams collection, and includes Pythagorean Theorem, area, angular bisectors, perpendicular bisectors, medians and altitudes.
Bigger is better: we've sized up these elements for full DCI 4K work (58 inches at 72 DPI / 4176 pixels) to eliminate, in most instances, the need to pre-compose/pre-rasterize.
AE/compositing-ready: each element is supplied as a properly labeled (element name in first layer), single artboard RGB AI (version 10) file. All layers are top-level so the file may be imported as flattened footage or as a time-saving pre-layered comp. Elements fill, but do not extend beyond, the 4K+ artboard.
Learn more on the AREA 6 site: area6.com/vector.html