Description: A visual proof that the sum of powers of 1/4 is equal to 1/3.
$18.00 $23.00
Description: A visual proof of the area formula for a circle.
$12.00 $15.00
Description: A circle divided into three parts
$20.00 $25.00
$2.50 $3.00
$23.00 $26.00
$2.75 $3.25
$6.00 $8.00
$13.25 $17.75