Ptolemy's theorem
Pythagorean theorem
equidiagonal
fourth power
cube
Ceva's theorem
biquadrate
biquadratic
quartic
third power
Fourier series
mean value theorem
equitangential
parallelogram
law of cosines
quadfurcated
biquadratic polynomial
quartic polynomial
distribution
arithmetic series
grand total
homogeneous polynomial
trace
homogeneous function
triexponential
quadrillionth
one-quadrillionth
quadral
Harnack's curve theorem
Chinese remainder theorem
quadratic
Slutsky's theorem
amplitude
rectify
quadratic polynomial
three-quarter
Brun's constant
perimeter
quadratic form
Tauberian theorem
Fourier analysis
harmonic analysis
Basel problem
Atiyah-Singer index theorem
degree
antitrigonometric function
polynomial
Varignon's theorem
link
multinomial
direct sum
hemimetric
multiplicative inverse
polyquadratic
multicurve
reciprocal
tridiagonality
degree of a term
quotient
rational
Richardson's theorem
one-fourth
three-fourths
flatiron
three-quarters
common ratio
third
series
Steiner point
absolutely summable
adequal
fourfold
quadrasonic
quadratics
quadriphonic
spectral theorem
Reuleaux polygon
quadrisonic
Heron's formula
quadraphonic
Bézout's theorem
arithmetic-geometric mean
exponent
threefold
superconic
index
curve deficiency
inverse trigonometric function
law of sines
quarter
power
squeeze theorem
natural function
quadrangular
deficiency