Area & Perimeter

{{ stepTitles[currentStep - 1] }}

1. AREA is the space INSIDE.
Tap all the dirt squares to plant seeds!

2. PERIMETER is the distance AROUND.
Tap the gray outlines to build a fence!

Area {{ s1AreaTapped.size }} sq

Perimeter {{ s1PerimTapped.size }}

🌱

Same Area, Different Perimeter?

Drag the two shapes that have an Area of 12 onto the scales.

{{ shape.w }} × {{ shape.h }}

Drop Shape Here

Perimeter

{{ (s2DropZone1.w + s2DropZone1.h) * 2 }}

??

Area 12

Drop Shape Here

Perimeter

{{ (s2DropZone2.w + s2DropZone2.h) * 2 }}

??

Area 12

Amazing! Same space inside, but different amounts of fence needed!

Same Perimeter, Different Area

You have exactly 16 units of fence.

Slide to build the shape with the BIGGEST Area!

Area

{{ s3Area }}

{{ s3Width }}

{{ s3Height }}

Perimeter = 16

Wide & Short Tall & Thin

The Master Builder

Draw any shape that matches BOTH targets.

(Drag or swipe over the grid to paint)

Target Area

{{ s4Area }} / {{ s4Target.a }}

Target Perimeter

{{ s4Perim }} / {{ s4Target.p }}