the faces of a pyramid always join at the top to form a common point,
or VERTEX.
See alsoSECTION IV CHARTS AND TABLES.
Pythagorean theoremUsed to determine the length of a side of a RIGHT
TRIANGLE, it states that the SQUAREof the length of the HYPOTENUSE
equals the SUMof the SQUAREDlengths of the other two sides. This is
written as c^2 =a^2 +b^2.
See alsoSECTION IV CHARTS AND TABLES.
quadrantEach of the four sections of a CARTESIAN COORDINATE SYSTEM
GRAPHthat are the result of the interception of the x-axis and
y-axis.
quadratic equationAny EQUATIONwith only a SQUARED TERMas its
highest term.
See alsoSECOND-DEGREE EQUATION.
quadratic equation standard formAll TERMs of the QUADRATIC EQUATION
are on the left side of the equals sign, and zero is on the right side,
and the terms can be expressed as ax^2 +bx+c= 0. F or example,
x^2 + 4x+ 7 = 0.
quadratic inequalityAny MATHEMATICAL SENTENCEthat is identical in form
to a QUADRATIC EQUATION, except that it contains an INEQUALITY
SIGNinstead of an equals sign. The standard form of a quadratic
inequality is the same as that of a quadratic equation, with the TERMs
on the left side of the inequality sign, and zero on the right side, for
example, ax^2 +bx+c< 0.
quadrilateral (tetragon)APOLYGONthat has four sides and four ANGLEs.
See alsoSECTION IV CHARTS AND TABLES.
quartic Fourth-degree term. For example, x^4.
quartic equationAn EQUATIONthat contains a TERMof the fourth degree
as its highest POWERed term. An equation containing an x^2 is a
SECOND-DEGREE EQUATION, an x^3 is a THIRD-DEGREE EQUATION,
anx^4 is a fourth-degree equation, x^5 is a fifth-degree equation, and
so on.
quaternary Four.
quintic Fifth-degree term. For example, x^5.
quintic equationAn EQUATIONthat contains a TERMof the fifth degree as
its highest POWERed term. An equation containing an x^2 is aGLOSSARY Pythagorean theorem – quintic equation
GLOSSARY Pythagorean theorem – quintic equation
Pythagorean theorem
a
2
+b
2
=c
2