tangent: a line that intersects a circle in one point.

tangent: in a triangle, (the side opposite an angle)
(the side adjacent the same angle).

term: a part of a sum in an algebraic expression.

terminating decimal: a fraction whose decimal representation contains a finite number of

digits.

tetrahedron: a polyhedron with four faces.

theorem: a statement that has been proven.

trajectory: the path that a body makes as it moves through space.

transitive property: the property that states that if a = b, and b = c, then a = c.

translation: a shift of the axes of the Cartesian Coordinate System.

transversal: a line that intersects two other lines.

trapezoid: a quadrilateral that has exactly two sides parallel.

triangle: a three sided polygon.

trinomial: a polynomial with exactly three terms.