I’ve got it–it only happens in Z-code. Observe.

[code]Length is a kind of value.

1m (in metric units, in m) or 1 m (in metric units, in m) or 1 meter (in meters, singular) or 1 metre

(in metres, singular) or 2 meters (in meters, plural) or 2 metres (in

metres, plural) specifies a length.

1cm (in metric units, in cm) or 1 cm (in metric units, in cm) or 1 centimeter (in centimeters,

singular) or 1 centimetre (in centimetres, singular) or 2 centimeters

(in centimeters, plural) or 2 centimetres (in centimetres, plural)

specifies a length scaled down by 100.

1km (in metric units, in km) or 1 km (in metric units, in km) or 1 kilometer (in kilometers, singular)

or 1 kilometre (in kilometres, singular) or 2 kilometers (in

kilometers, plural) or 2 kilometres (in kilometres, plural) specifies

a length scaled up by 1000.

Area is a kind of value. 1 sq m (in metric units, in sq m) or 1 square meter (in square meters,

singular) or 2 square meters (in square meters, plural) or 1 square metre

(in square metres, singular) or 2 square metres (in square metres, plural)

specifies an area.

Length times length specifies an area.

To decide what area is the square of (N - a length):

decide on N * N.

When play begins: say “The square of 1m is [square of 1m]. The square of 2m is [square of 2m]. The square of 3m is [square of 3m]. The square of 4m is [square of 4m]. The square of 5m is [square of 5m].”

The geometry lab is a room.[/code]