In marble sets and marble runs the 1 3 8 of an inch and the 1 5 8 of an inch marbles are the more common choices.
Average radius of a marble.
Write down the measurement.
Most commonly they are about 13 mm 1 2 in in diameter but they may range from less than 1 mm 1 30 in to over 8 cm 3 in while some art glass marbles for display purposes are over 30 cm 12 in wide.
Most templates measure to 16ths of an inch.
Marbles can be used for a variety of games called marbles.
Discuss with the class the difficulties with this method in particular the shape of the marble.
This is important when buying and selling marbles as collectors base price on the size.
Give students a single marble and ask them to measure the radius using a ruler.
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