| Answer | Crossword Clue |
|---|---|
| isoperimeters | ISOPERIMETER, a figure with perimeter equal to another |
| isoperimeter | a figure with perimeter equal to another |
| quadrature | The process of constructing a square with an area equal to that of a circle, or of another figure bounded by a curve |
| matches | A person or thing able to contend with another as an equal in quality or strength |
| equivalents | A person or thing that is equal to or corresponds with another in value, amount, function, meaning, etc |
| antiparallel | making with a transverse line an internal angle equal to the external angle made by another line / an antiparallel line |
