De Moivre’s Theorem

Decagon

Deciles

Decreasing Function

Definite Integral

Definite Integral Rules

Degenerate

Degenerate Conic Sections

Degree (angle measure)

Degree of a Polynomial

Degree of a Term

Del Operator

Deleted Neighborhood

Delta (Δ δ)

Denominator

Dependent Variable

Derivative

Derivative of a Power Series

Derivative Rules

Descartes' Rule of Signs

Determinant

Diagonal Matrix

Diagonal of a Polygon

Diameter

Diametrically Opposed

Difference

Difference Identities

Difference Quotient

Differentiable

Differential

Differential Equation

Differentiation

Differentiation Rules

Digit

Dihedral Angle

Dilation

Dilation of a Geometric Figure

Dilation of a Graph

Dimensions

Dimensions of a Matrix

Direct Proportion

Direct Variation

Directly Proportional

Directrices of an Ellipse

Directrices of a Hyperbola

Directrix of a Parabola

Discontinuity

Discontinuous Function

Discrete

Discriminant of a Quadratic

Disjoint Events

Disjoint Sets

Disjunction

Disk

Disk Method

Distance Formula

Distance from a Point to a Line

Distinct

Distribute

Distributing Rules

Diverge

Divergent Sequence

Divergent Series

Dodecagon

Dodecahedron

Domain

Domain of Definition

Dot Product

Double Angle Identities

Double Cone

Double Number Identities

Double Root

Doubling Time