Beautiful Planimetry

Geometry doesn’t have to feel impossible.

When my daughter first opened her geometry book, she looked at the page — circles, triangles, and lines everywhere — and sighed: “Dad, this makes no sense.” I knew that feeling. So I built a way to make geometry visible.

With sliders, motion, and colour, she could see how shapes connect — how an angle changes a triangle, how circles hide perfect relationships, how formulas aren’t just rules but reflections of movement.

That small idea became Beautiful Planimetry — an interactive geometry world where math comes alive.

Instead of memorising formulas, explore how they work. Move a slider and watch a shape stretch, rotate, or reveal a hidden pattern. Suddenly, geometry isn’t about remembering — it’s about discovering.

What you’ll find inside

Included for free:

• Circle Geometry: basics, inscribed angle, right triangle on diameter, law of sines
• Circle Area: circle, sector, segment, ring
• Thales’ Theorem: parallel lines crossed by an angle
• Angle Bisector: see how angles are perfectly divided
• Triangle Basics: triangle types, Pythagoras, law of cosines, inscribed circle in a right triangle, right triangle inscribed in a circle

Unlock more with one in-app purchase:

• Triangle Area: base × height, two sides + angle, Heron’s formula, equilateral triangle
• Quadrilaterals: square, rectangle, parallelogram, rhombus, trapezoid, kite
• Regular Polygons: triangle, square, pentagon, hexagon, octagon

Why students love it

• Visual learning — see shapes change in real time
• Instant clarity — connect formulas to the figures they describe
• Confidence boost — explore before practicing, so exercises feel easier

Who it’s for

• Students who want geometry to finally click
• Teens tired of memorising without understanding
• Parents and tutors who want to make math less stressful

Beautiful Planimetry was born from a real story: a dad helping his daughter who struggled with math. What started as a simple app to make functions easier has grown into a family of apps that now includes geometry.

Stop memorising. Start understanding. With Beautiful Planimetry, geometry becomes simple, visual, and — yes — beautiful.