Polygon Area Calculator - Online Irregular Shape Tool
Calculate the area of an irregular polygon by entering its vertex coordinates. Uses the shoelace formula. Pure math.
UD5 Toolkit
Test your knowledge of area formulas for triangles, circles, rectangles, and trapezoids!
Enter the area in square units.
Calculate the area of an irregular polygon by entering its vertex coordinates. Uses the shoelace formula. Pure math.
Draw perfect ellipses by dragging focal points and a point on the curve. See the equation update dynamically. Educational.
Estimate make probability of a putt based on distance and skill rating. For disc golf enthusiasts. Fun statistical tool, no data upload.
Find the area of an ellipse (oval) from its semi-major and semi-minor axes. Includes circumference approximation for a complete geometric analysis.
Answer 5 silly questions and get a fruit personality result with a description. Harmless fun, local only.
Show a word and guess the correct translation, but watch out for false friends. Avoid embarrassment.
Randomly show a Q-code and select correct meaning. Learn while having fun. For your license exam.
Learn to identify the 10 basic cloud types from photos. Self‑test quiz mode. Useful for pilots and hikers.
See a clip of a famous artwork and choose the correct title. Art history fun. Local images.
Complete a 10x10 multiplication grid against the clock. A fun way to master times tables.
See a cropped or simplified brand logo and guess the company. Hints available, score track. Local fun, no copyright infringement.
A country border shape appears, guess the nation. Multiple choice. Score tracking. Learn geography visually. Local SVG shapes.
A short lyric is shown, guess the song title. Score tracking. Multiple genres. Local database of snippets. No playback needed.
Guess the movie title from a sequence of emojis. Hundreds of puzzles, score tracking. Pure frontend fun.
Identify dog breeds from silhouettes or partial images. Score tracking. Fun for all ages. Local only, no images uploaded.
Identify countries from their flags. Multiple difficulty levels and regions. Track your high score. Educational geography game. Works offline.
Practice calculating network ID, broadcast address, and usable IPs from a random IP/CIDR combination. Instant feedback and score tracking. Perfect for CCNA prep.
Test how fast you can convert between binary and decimal. Timed drills with increasing difficulty. Learn base‑2 fluency.
Randomly generated subnetting questions. Calculate network address, broadcast, and usable range. For CCNA prep.
Test your knowledge of American Sign Language letters. See a sign and type the letter. Improve receptive skills. Local.
Test your knowledge: given a state name, pick its capital. Timed, with scoreboard. Learn all 50. No login.
Click for a random general knowledge question, then reveal the answer. Covers science, history, pop culture.
A silhouette of a country appears; type the name. Timed guesses. Great for geography buffs.
Test your knowledge of world capitals. Multiple choice, timed rounds. Improve your geography skills. No data collection.
Random world flags shown; pick the correct country name from four choices. Score and streak. Learn geography.
Test your knowledge of the NATO phonetic alphabet. Timed quiz with letter‑to‑code and code‑to‑letter modes.
Shows a random short word and displays animated ASL fingerspelling letters. Type what you see. Improve receptive skills.
Enter a number of sides (3‑100) and get the correct polygon name (triangle, hectogon). Fun geometry reference.
Answer a series of deliberately confusing and trick questions. Lives system and funny wrong answers. Playful, no data stored.
Drag the seven tangram pieces to form a target silhouette. Multiple puzzles. Develop spatial thinking. All canvas interactions.