Fold a rectangular sheet in half so the two parts cover each other. What is each part called?
The whole is one sheet of paper.
The fold makes two parts with the same area.
Each of the two equal shares is one half.
Each part is one half.
Example 2
Four pieces are not always fourths
A rectangle is made from four equal squares in a row. One piece contains two squares; the other two pieces contain one square each. Are the three pieces thirds?
Count the pieces: there are three.
Compare their areas: the largest covers two squares, but each smaller piece covers one.
Thirds must be three equal shares of the whole. These shares are unequal.
No. The three pieces do not have equal area.
A question from this worksheet
Choose the bar split into 4 equal shares.
See the explanation
Model B
A whole split into 4 equal shares has fourths. Counting pieces alone is not enough: their areas must match.
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