A whole shape or region can be partitioned into two or four equal shares, where each part has the same area or length and represents the same amount of the whole; these shares are called halves or fourths. The parts must be equal in size, not merely equal in number, so a shape divided into pieces of different sizes does not show equal parts. This understanding supports interpreting and comparing fractions.
Equal parts are pieces that are the same size. They cover the whole shape without overlapping or leaving spaces.
Example: A square is divided into 4 small squares.
So, the square shows 4 equal parts, or fourths.
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