Euclidea4.22 - App Store

Euclidea is geometrical puzzles based on classical Euclidian constructions.

> 156 Levels: from very easy to really hard
> 10 Innovative Tools
> "Explore" Mode and Hints
> Easily Drag, Zoom & Pan
> Compete with Friends via the Game Center
> No Advertising!

New levels are unlocked as you solve the previous ones. You can complete the whole game only if you earn all the stars (L, E, and V). But you can buy an IAP that removes this restriction. Find more useful hints on Euclidea on our site: https://www.euclidea.xyz/faq.

“Euclidea has been shown to help with imagination, intuition, and logic, all wonderful skills to develop.” - appPicker

“Euclidea is an absolute joy to play...it’s a game that every math student should have and, in an ideal world, every adult should like.” - Non-Trivial Games

***About Euclidea***
Euclidea is a brilliantly original way to learn about, explore and have fun with Euclidian Constructions! Your task is to solve interesting challenges by building geometric constructions with a straightedge and compass. If you design the most elegantly simple solutions in the least number of moves, you’ll earn the highest scores. Solutions are scored in lines (L) and elementary Euclidean constructions (E).

***Start Simple and Get Smarter!***
Don’t worry if you aren’t a math wizard. Euclidea starts out with simple challenges that guide you through the basics. Once you master the fundamentals, you’ll move on to tougher, more mind-bending challenges such as inner/outer tangents, regular polygons, and more. There are 120 unique challenges in total, which are organized in packs for simpler navigation.

***Add Constructions to Your Interface***
When you learn certain significant constructions - such as angle bisectors, non-collapsing compass, and so on - they are automatically added to the Euclidea interface’s shortcut, which helps you save time and allows you to create clean, uncluttered drawings.

***Easily Drag, Pan & Zoom***
Euclidea-created constructions are completely dynamic. As such, you can drag to adjust angles, lines, radii and so on. You can also easily zoom and pan. This not only makes the experience more interactive, but it allows you to more deeply grasp the relationships between geometric elements, explore various possibilities, and analyze errors.

***Instant, Automatic Precision***
Don’t worry about spending time or effort trying to achieve perfect precision, because Euclidea automatically handles that task by pinning points, lines and circles to the app’s clean interface.

***Compete with Friends***
Who said that math isn’t a competitive sport? Challenge your friends to see who can come up with the most elegant solutions, and track your achievements and rankings via the Game Center.

***Additional Special Features***
> A helpful “Explore” mode that allows you to see the figure you need to construct
> An inventory of tools that you create as you progress - you’ll need these to solve future challenges
> Some challenges can be solved in more than one way, which means you can try a different approach and have even more fun

***Questions? Comments?
Send in your inquiries and stay up-to-date on the latest Euclidea news at https://www.euclidea.xyz/

Version History • Fixed bugs

If you enjoy Euclidea, please leave a nice review in App Store. Happy solving! 4.22 06/29/2020 • Added 5 new challenges:
4.11 "Square by Two Vertices"
8.8 "Octagon from Square"
8.9 "Egyptian Triangle by Side of Length 4"
8.10 "Chord Parallel to Segment"
13.10 "Billiards on Round Table"
• Updated the number of moves for minimum solutions: 10.4 "Rotation 90°"
• Supported Czech language. Thanks to Přemysl Pleva!
• Fixed bugs

If you enjoy Euclidea, please leave a nice review in App Store. Happy solving! 4.20 05/17/2020 • Updated the minimum number of moves for:
10.11 "Three Circles - 2"
12.4 "Triangle by Tangent Points"

• Supported Vietnamese language. Thanks to Đào Duy Thức!

• Removed the first tutorial levels: Line Tool, Circle Tool, Point Tool.

• Fixed bugs.

If you enjoy Euclidea, please leave a nice review in App Store. Happy solving! 4.16 09/26/2019 • Updated the number of moves for minimum solutions:

6.11 "Parallelogram by Three Midpoints"
12.8 "Hypotenuse and Altitude"

• Supported Slovak language. Thanks to Peter Klein!

• Fixed bugs.

If you enjoy Euclidea, please leave a nice review in App Store. Happy solving! 4.14 04/29/2019 • Added 8 new challenges:
6.11 "Parallelogram by Three Midpoints"
7.8 "Circle Tangent to Three Lines "
10.12 "Center of Rotation "
12.8 "Hypotenuse and Altitude"
13.3 "Equilateral Triangle On Concentric Circles"
13.9 "Square by Four Points"
14.5 "Arbelos"
15.11 "Mickey Mouse"

• Level "Ratio 1 to 5" (10.9) moved from Kappa to Lambda (11.10).

• Fixed bugs.

If you enjoy Euclidea, please leave a nice review in App Store. Happy solving! 4.12 12/06/2018 • Level "Isosceles Triangle by Tangent Points" (3.10) moved from Gamma to Mu (12.9).

• Updated the number of moves for minimum solutions:
6.10 "Symmetry of Four Lines"
8.6 "Torricelli Point"
3.10 (12.9) "Isosceles Triangle by Tangent Points"

• Supported Polish languages (thanks to Roman Matuła, Mateusz Zugaj, Dominik Tabisz, and Kuba Wolszczak!).

• Fixed bugs.

If you enjoy Euclidea, please leave a nice review on the store. Happy solving! 4.08 08/06/2018 • Added 8 new challenges:

3.10 "Isosceles Triangle by Tangent Points"
6.10 "Symmetry of Four Lines"
8.5 "Triangle Cleaver"
8.6 "Torricelli Point"
8.7 "Circle Equidistant from Four Points"
11.9 "Point Farthest from Angle Sides"
12.6 "Equilateral Triangle by Centroid and Two Points"
13.7 "Line Reflection"

• Updated the number of moves for minimum solutions:

15.4 "Three Equal Segments"
15.8 "Line-Circle Intersection*"

• Supported new languages: Ukrainian (thanks to Volodymyr Stadnyk!) and Dutch (thanks to Jeanne Kok and Peter Ypma!)

• Fixed bugs

If you enjoy Euclidea, please leave a nice review on the store. Happy solving! 4.07 04/06/2018 Now you can:
• Save your progress in the cloud and transfer it between devices
• Use the glossary offline
• Play at night on a dark screen ($)

And also:
• Updated translations
• Updated app settings
• Added support for iPhone X
• Fixed bugs

If you enjoy Euclidea, please leave a nice review on the store. Happy solving! 4.0 12/11/2017 • Level "Line Equidistant from Two Lines" moved from Beta (2.8) to Epsilon (5.7)
• Updated Greek and German resources
• Fixed bugs

If you enjoy Euclidea, please leave a nice review on the store. Happy solving! 3.37 08/10/2017 Fixed bugs. 3.34 07/07/2017 Fixed unlocking new levels. 3.33 07/01/2017 • Added 8 new challenges:
2.2 "Intersection of Angle Bisectors"
2.8 "Line Equidistant from Two Lines"
3.9 "Centroid of Quadrilateral"
5.9 "Circle Tangent to Square Side"
6.9 "Nine Point Circle"
8.12 "Triangle Mid-Segment"
12.6 "Inscribed Square - 2"
13.4 "Parallelogram on Four Lines"

• Removed challenge 5.5 ("Arithmetic Mean of Trapezoid Bases"): it was replaced by 2.8 and 8.12

• Updated the number of moves for the minimum solutions:
11.3 "Triangle by Altitude Base Points"
12.5 "Rhombus in Triangle"

• Fixed bugs 3.30 06/28/2017 • Updated the number of moves for minimum solutions:
8.8 "Trisection by Trapezoid Diagonals "
• Added quotes in French (merci à Matthieu Courbaize!)
• Fixed bugs

If you enjoy Euclidea, please leave a nice review on the store. Happy solving! 3.23 03/20/2017 • Fixed bugs.

If you enjoy Euclidea, please leave a nice review on the store. Happy solving! 3.20 02/09/2017 • Supported new languages: Chinese (Simplified), French, German, Greek, Italian, Japanese, Korean, Portuguese (Brazil) and Spanish.
• A language can be switched in the application settings.
• Updated the number of moves for minimum solutions:
5.5 "Arithmetic Mean of Trapezoid Bases"
7.3 "Angle of 75°"
• Fixed bugs

If you enjoy Euclidea, please leave a nice review on the store. Happy solving! 3.18 01/29/2017 • Coins were cancelled. As a compensation for those who had coins, we unlocked all the items that could be bought using coins. Please contact us if you have any problems with this feature.
• Supported portrait orientation on iPad.
• Swipe gesture can be used to change packs.
• The initial position of points can be restored when the Hand tool is active.
• The field can be rotated only when the Hand tool is active.
• To skip a level, tap the "Next" button in the menu.
• Game Center can be switched off in the settings.
• Updated the number of moves for minimum solutions:
4.4 "Equilateral Triangle in Circle"
6.8 "Hypotenuse and Leg"
9.6 "Segment Trisection"
9.9 "Ratio 1 to 5"
10.4 "Angle of 54°"
10.5 "Third Parallel Line"
10.6 "Circle in Angle"
10.7 "Geometric Mean of Trapezoid Bases"
10.8 "Regular Pentagon"
10.9 "Angle of 3°"
12.1 "Circle Tangent to Line and Circle"
12.4 "Point Equidistant from Side of Angle and Point"
12.6 "Circle Through Two Points and Tangent to Line"
13.8 "Line-Circle Intersection*"
13.9 "Circle with Center on Line"
• Now you can express your gratitude to us via IAP (choose "Settings -> Thanks to developers").
• Fixed bugs

If you enjoy Euclidea, please leave a nice review on the store. Happy solving! 3.14 11/05/2016 • Fixed leaderboards in Game Center
• Updated the number of moves for minimum solutions:
2.8 "Tangent to Circle at Point"
4.2 "Angle of 60° - 2"
4.4 "Equilateral Triangle in Circle"
8.1 "Minimum Perimeter - 1"
11.5 "Triangle by Excenters"
12.7 "Triangle by Tangent Point on Hypotenuse"
13.9 "Circle with Center on Line"
• Fixed bugs 3.05 01/06/2016 • New V-star (V = variants). You can get it if there are several objects satisfying a statement and you construct them all.
• Your constructions can be saved and restored. All solutions are automatically saved.
• New hints for the most popular problems.
• Glossary. Geometric definitions are available right from the statement of a problem.
• All the tools support dragging. An object is visible while it is being constructed.
• Added more than 30 new challenges. Updated the number of moves for 11 levels.
• Improved performance and fixed bugs. 3.04 12/21/2015 • Added 7 new challenges: "Parallelogram", "Square by 2 Opposite Midpoints", "Square by 2 Adjacent Midpoints", "Cut Rectangle", "Cut 2 Rectangles", "Angle of 3°", and "Square in Triangle"
• Added new tutorials: "Tutorial: Intersect Tool", "Tutorial: Move Tool"
• Updated number of moves for "Three Circles - 2", "Circle in Angle", "Circle Tangent to Line and Circle", and "Drop a Perpendicular**"
• Fixed bugs 2.12 08/01/2015 • Now you can skip levels (in the Hints popup)
• Added 7 challenges: "Orthic Triangle", "Circle In Angle", "Three Circles - 2",
"Drop a Perpendicular**", "Three equal segments", "Circle tangent to line and circle", "Equilateral Triangle - 2"
• Expanded References 2.09 06/21/2015 2.07 06/01/2015