EasyMemoryItem vs 3D Geometry

Memory Items, limitations and type rating prep for pilots. Minimum effort, maximum safety. EasyMemoryItem keeps the knowledge you need in an emergency fresh: short, focused sessions on the Memory Items, checklists, limitations and systems of your aircraft. Less than 20 minutes a month keeps you fit. READY-MADE CONTENT A320, A330, 737, 777, Phenom, DR400, P2008 and more. More than 470 checklists and 3,600 systems questions, curated from the manuals. LEARN Study normal, abnormal and emergency checklists step by step. Reveal each prompt, response and limitation value at your own pace. Every checklist shows its section number from your POH or AFM, so you find it in the book in seconds. QUIZ Multiple-choice questions, checklist sequencing and complete type rating test sets, graded immediately. Focus finds your weak spots and brings them back in your next session. FLY Run checklists with clear progress: check, skip, resume and reset items, with a separate state for every aircraft. Multi-crew checklists focus on Pilot Flying, Pilot Monitoring or both. WORKS OFFLINE Downloaded aircraft keep working in the cockpit without a network. Your progress syncs when you are back online. FOR TRAINING ORGANIZATIONS Your aircraft, your SOPs: edit your own content on easymemoryitem.com, for yourself or your whole fleet, and publish it to your pilots. TRUSTED BY PILOTS More than 35,000 downloads since 2018. "It helps me very much with my type rating A320! It is much easier to memorize all the memory items as well as the limitations." First Officer, A320 type rating EMI PRO A curated starter selection is free. EMI Pro unlocks every published checklist and learning tool. EasyMemoryItem is a training and reference aid. It does not replace official aircraft documentation, approved operator procedures or pilot judgment. Terms of Use: https://easymemoryitem.com/terms-of-use/

Solid geometry is hard when you can't picture it. 3D Geometry turns textbook diagrams into 3D models you can rotate, slice and unfold, and gives every length, area and volume as an exact value like 2√2 or 12π. Free to download: the core 3D models, formulas and unfolding animations are free, and every Pro tool can be tried in full once before you decide. FREE FEATURES • 9 solids: cube, cuboid, regular tetrahedron, square pyramid, triangular prism, cylinder, cone, sphere, torus • Textbook labeling (ABCD-A₁B₁C₁D₁); hidden edges turn dashed automatically from any angle • Formulas with exact answers: surface area, volume, diagonals, slant height and more • Unfolding animations: cubes, prisms and pyramids open step by step; a cone unrolls into a sector; a sphere is approximated by orange-peel gores PRO PROBLEM-SOLVING TOOLS • Cross-sections: drag a cutting plane and see the section's shape and area in real time. Reproduce the triangle, rhombus, pentagon and regular hexagon sections of a cube, or slice a cone to get an ellipse, parabola and hyperbola • Angles and distances in space: tap points in 3D to get the angle between skew lines, line–plane angle, dihedral angle, point-to-plane distance and distance between skew lines, with the translated line, projection or common perpendicular drawn for you • Circumscribed and inscribed spheres: center, radius and derivation steps, all visualized • Shortest paths: the classic "ant on a box" problem with three unfoldings compared; unroll a cylinder or cone to turn the curved path into a straight line • Cube nets: folding animations for all 11 nets, opposite faces color-matched, common trick shapes, and a random "will it fold?" quiz • Three views: front, side and top orthographic views in standard layout, with hidden edges dashed • 24 worked exam-style problems: hint, answer, then step-by-step solution, each opening in 3D so you can explore it yourself • Classroom mode: full-screen presentation, whiteboard background, pen annotations, and export to high-resolution images and GIF animations for slides ONE-TIME PURCHASE, NO SUBSCRIPTION Pro is a single in-app purchase that unlocks everything on iPhone, iPad and Mac. WHO IT'S FOR • Middle school students: nets, shortest paths, three views • High school students: cross-sections, circumscribed spheres, angles and distances in space • Math teachers: demonstrate on a projector, annotate, and export animations for lessons Note: the in-app text is currently in Chinese. The 3D models, labels and math notation work in any language.