Geometry Deck - Shape Cards

EduDecks

About this app

Master geometric formulas, properties, and algebraic proofs with Geometry Deck! Designed for upper elementary, middle school, and early high school students (ages 9 to 14), Geometry Deck turns complex geometry into intuitive, interactive visual models.

TOPICS COVERED:
• Triangles: Pythagorean theorem (a² + b² = c²), equilateral, isosceles, scalene properties, triangle angle sum (180°), and base-height area formulas.
• Angles: Acute, obtuse, right, reflex, complementary (90°), supplementary (180°), vertically opposite, and parallel line transversals (alternate and co-interior).
• Quadrilaterals: Rectangles, squares, parallelograms, trapezoids, and rhombuses with area and perimeter calculations.
• Circles: Radius, diameter, circumference (C = 2πr), area (A = πr²), and the geometric definition of Pi (π).
• Polygons: Interior angle sums ((n - 2) × 180°), exterior angle sums (360°), and regular polygon side calculations.
• 3D Shapes: Prisms, cylinders, cones, spheres, pyramids, and Euler's Polyhedral Formula (V - E + F = 2).

INTERACTIVE QUIZ MODE:
• Numeric Calculation Quizzes: Solve for missing angles, unknown hypotenuses, area, perimeter, and 3D volume.
• On-Screen Keypad: Instant answer validation, audio speech feedback, celebration chimes, and streak tracking.

100% PRIVATE AND AD-FREE:
• No advertisements, no subscriptions, no user account required, and zero tracking.
• Works completely offline — built for classrooms, homeschoolers, and distraction-free study.

What’s new

• Performance improvements and bug fixes.