intersectionA solution SETthat includes only the elements that are common
to each individual set. For example, if A= {all EVEN NUMBERs
between 0 and 10} and B= {all numbers between 7 and 15}, then the
intersection of Aand Bincludes only the number 8, because 8 is the
only element that both sets have in common. Intersection is identified
with the symbol ∩. This example is written A ∩B = 8.
inverse operationsA method of undoing one operation with another. For
example, addition and subtraction are inverse operations of each
other, and MULTIPLICATIONand division are inverse operations of one
another. Inverse operations are often used to check answers for
accuracy, for example, using addition to check subtraction, and using
multiplication to check division.
See alsoSECTION IV CHARTS AND TABLES.
involutionSeeEXPONENTIATION.
irrational numberAny REAL NUMBERthat cannot be written as a SIMPLE
FRACTION; any number that is not a RATIONAL NUMBER. For example,
pi and the SQUARE ROOTof 2 are both irrational numbers.
See alsoSECTION IV CHARTS AND TABLES.
isosceles right triangleAn ISOSCELES TRIANGLEthat, in addition to having
two equal sides, has one ANGLEthat measures exactly 90°.
See alsoSECTION IV CHARTS AND TABLES.
intersection – isosceles right triangle GLOSSARY
intersection – isosceles right triangle GLOSSARY
AAU
BBIntersectionIsosceles right triangle