Simplify the following text for a Grade 7 native English-speaking person.
Original: The eight vertices of the hexadecachoron are ( Â 1 , 0 , 0 , 0 ) , ( 0 , Â 1 , 0 , 0 ) , ( 0 , 0 , Â 1 , 0 ) , ( 0 , 0 , 0 , Â 1 ) .
Simplified: The eight vertices of the 16-cell are ( Â 1 , 0 , 0 , 0 ) , ( 0 , Â 1 , 0 , 0 ) , ( 0 , 0 , Â 1 , 0 ) , ( 0 , 0 , 0 , Â 1 ) .