icosahedronA 20-sided POLYHEDRON, in which all 20 faces are EQUILATERAL
TRIANGLEs.
See alsoSECTION IV CHARTS AND TABLES.
identity Any EQUATIONin which all real values of the VARIABLEwill make
the equation true.
Identity PropertyAny quantity or number is equal to itself, written as a=a.
See alsoSECTION IV CHARTS AND TABLES.
Identity Property of AdditionSeeADDITIVE IDENTITY PROPERTY.
Identity Property of MultiplicationSeeMULTIPLICATIVE IDENTITY
PROPERTY.
imaginary numberThe SQUARE ROOTof any negative REAL NUMBER.
imperfect numberAny number whose FACTORs (excluding the number
itself), when added up, equal a SUMmore than or less than the
number itself. Both ABUNDANT NUMBERs and DEFICIENT NUMBERs
are imperfect numbers.
icosahedron – imperfect number GLOSSARY
icosahedron – imperfect number GLOSSARY
aHypotenuseIcosahedron