fraction shading

a ppt is here

shade the fraction shown:

fraction wall

pies

what are each of the fractions if a whole circle is 1?
same colours should be the same fraction

how many degrees to each sector (pie piece)?

what fraction?

what fraction is the red square of the whole square?

going 3D,

what fraction (volume) is the smallest cube of the largest one?

a model for powers of 8