Step {{ step }} of {{ totalSteps }}

Drag labels to the circle

Radius
Diameter
Center
{{ item.label }}

Slide to unroll the circle

Start 1 Diameter 2 Diameters 3 Diameters {{ (s2_progress/100 * 3.14).toFixed(2) }} d

The distance around is the Circumference. Unroll it!

It takes a little more than 3 diameters to go around!

Tap to arrange slices

Height = r
touch_app Tap to toggle

A circle can be sliced into pieces...

Arranged like a rectangle, Area = base × height

Solve the puzzle

r = {{ s4_r }}

Find the {{ s4_mode === 'area' ? 'Area' : 'Circumference' }}

Use

{{ s4_mode === 'area' ? 'A =' : 'C =' }} {{ s4_input || '_' }}
🏆

Circle Master!

You've conquered the shapes. Remember:
 and 

{{ draggedItem.label }}