Term
|
Definition
|
| table |
a way to display data in rows and columns |
| tan |
trig ratio tan θ = opp/adj
  |
| tangent |
a line that touches a circle or curve at only one point |
| taxable income |
income that tax is calculated on. Gross income subtracted by allowable deductions |
| term |
the name of a part of an algebraic expression. 2x + 4 has two terms, 2x and 4 |
| terminating decimal |
a decimal that can be expressed exactly to a finite number of decimal places |
| tessellation |
a repeating pattern of figures that completely covers a plane without gaps or overlap |
| tetrahedron |
four sided solid such as a triangular pyramid
 |
| theta |
Greek letter often used to represent unknown angles. Capital theta, Θ is rarely used, but small theta, θ is used commonly in maths |
| tonne |
a metric unit of weight. One tonne equals 1000 kg |
| torus |
a 3d shape like the shape of a doughnut
 |
| total |
sum |
| transformation |
when a change is made to a shape to move or make a new shape:translate, reflect, rotate, enlarge |
| translation |
transformation of sliding a shape |
| transpose |
to replace |
| transversal |
a line that crosses two or more lines |
| trapeziod |
a quadrilateral where no sides are equal |
| trapeziodal rule |
used to find an approximate area under a curve A ≈ h/2 |
| trapezium |
quadrilateral with one pair of opposite sides parallel . The area of a trapezium is given by: A = h/2(a + b), where a and b are the two parallel sides and h is the perpendicular distance between them. If the two non-parallel sides are equal, then it is an isosceles trapezium
 |
| travel graph |
a straight line graph used to show distance travelled. Time is displayed on the horizontal axis, and distance from a certain point on the vertical axis. A horizontal line on a travel graph means that they are stopped, not travelling. |
| tree diagram |
a diagram to display the probabilities and outcomes of an event
 |
| trial and error |
guess and check method. Basically you make a guess at an answer, check to see if it is right, then try again until you get the correct answer |
| triangle |
3 sided figure. Area = 1/2bh
 |
| triangle inequality |
the lenghts of two sides of the triangle must sum to be greater than the third side. |
| triangular numbers |
1, 3, 6, 10, 15, 21, 28, 36, …. |
| triangular prism |
prism with a triangular base, looking like a tent. It has five faces, six vertices and 9 edges
 |
| triangular pyramid |
pyramid with a triangular base. It has four faces, four vertices and six edges
|
| trig |
abbreviated form of trigonometry |
| trigonometry |
area of study dealing with relationships between angles and side lengths |
| trinomial |
any algebraic expression with three terms |
| truncated |
to be shortened or 'chopped off'. A truncated decimal is a rounded decimal. The diagram shows a truncated cone.
 |
| turning point |
the point of a curve where the tangent to the curve at that point is horizontal. Turning points are found by setting dy/dx = 0
 |
| twice |
to multiply by two, to double |
