Level: Beginner | Count squares to estimate area
Click on squares that are completely inside the circle (blue)
Click squares that are partially inside the circle (green)
Count partial squares as 0.5 each
• Click squares completely inside the circle (count as 1)
• Click squares partially inside the circle (count as 0.5)
• Add full squares + (partial squares × 0.5)
• Compare your estimate with π × r²
• Use hints to see the correct counting
• Reset grid to start counting again
• Higher levels have larger, more complex circles
• Enable voice for audio feedback