Area of Shapes
by Anonymous
Cut and rearrange parallelograms and triangles into rectangles to discover the area formulas yourself.
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About this app
Area of Shapes is an interactive elementary math activity for discovering area formulas through visual transformations. Explore rectangles by changing width and height, turn parallelograms into rectangles by cutting and sliding a triangular piece, and combine two identical triangles to form a parallelogram. Guided missions help learners connect unit squares, base and height, and the triangle’s divide-by-two rule.
Use cases
- Elementary students learning area measurement
- Teachers demonstrating area formulas visually
- Parents practicing geometry concepts with children
- Learners reviewing rectangle, parallelogram, and triangle area
Features
- Interactive tabs for rectangles, parallelograms, and triangles
- Adjustable dimensions using plus and minus controls
- Slider animation for cutting and moving a parallelogram piece
- Slider animation for flipping and attaching an identical triangle
- Four guided missions in each shape section
- Live formulas and area values based on the selected dimensions