abnormal distribution acute triangle arc cosecant arc cosine arc cotangent arc secant arc sine arc tangent bar graph barycenter barycentre broken line graph center centre circumcircle complement@1 cubic equation curve diagram definite integral derivative domain equilateral polygon escenter escentre evolution excenter excentre extraction field of definition frustum of a cone frustum of a prism hexadecimal system histogram hypothesis incenter incentre indefinite integral inequation inscribed circle insignificant digit intersection isosceles trapezoid mapping monotonicity normal distribution obtuse triangle parity perigon pie diagram Pythagorean theorem quartic equation radial range rational number right trapezoid root-mean-square deviation significance significant digit subset the fourth power the fourth root the nth power the nth root the power of four the power of n the root of four the root of n truncation union unknown variance void weight@2 weighted average x-factor y-factor z-factor