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...tuples (a,b) and (b,a) are not equal, and the tuples (a,a) and (a) are not equal either. ...ltisets {a,b} and {b,a} are equal, but the multisets {a,a} and {a} are not equal. ...

...s of the pairs are equal, and also the second coordinates of the pairs are equal. ...

...nality of the set ''B'' is ''greater than or equal to'' (or ''more than or equal'' members) set ''B'' if and only if there is an injective function from ''A ...

...follows that the lengths of the pairs of sides opposite each other must be equal. A rectangle with all four sides equal in length is called a [[square (geometry)|square]]. ...

In [[algebra]], the '''discriminant''' of a [[polynomial]] that is equal to zero with [[real number|real]] or [[complex number|complex]] [[coefficie If the discriminant is equal to zero, then there are two repeating [[real numbers]], i.e. exactly one re ...

In all Parallelogram's opposite angles are equal to each other. *Two pairs of opposite sides are equal in length ...

...egular]] decagon, having all sides of equal length and each internal angle equal to 144°. ...

...i</math> and <math>\theta _r</math>) must be equal. Both angles have to be equal whenever reflection occurs. This is known as the "law of reflection". ...

...gle]]''' - A right-angled triangle is a triangle that has an angle that is equal to 90 degrees. (A triangle cannot have more than one right angle) The stand * '''Sine''' (sin) - The sine of an angle is equal to the <math>{\text{Opposite} \over \text{Hypotenuse}}</math><br /> ...

...]s of things can be ordered: Take the first element of a set, it is either equal to the element looked for, or there is an order relation that can be used t ...mple of a symmetric relation is "is equal to". If X "is equal to" Y, Y "is equal to" X. ...

...rface area and the time for planet 1 to cover segment ''A''₁ is equal to the time to cover segment ''A''₂. <br><br> (3) The total orbi #A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time. ...

*for [[circular orbit]]s: <math>e\,\!</math> is equal to zero, *for parabolic trajectories: <math>e\,\!</math> is equal to 1, ...

Power is also equal to force times velocity (or speed). ...focus]] light. It is measured in [[dioptre]]s (inverse [[metre]]s), and is equal to one over the [[focal length]] of the optical device. ...

| equals, is equal to | approximately equal ...

...hematics)|function]] counting the number of [[prime number]]s less than or equal to some [[real number]] ''x''. It is written as <math>\pi(x)</math>, but it ...

* A finite number is a number which is not equal to <math>\pm\infty</math>; all [[real number]]s are finite. ...

...ound the [[equation]] for [[energy]]: [[E=mc²]]. This means that energy is equal to a certain amount of [[mass]]. However, this is a simplified version of h ...f light (which is "c" in this equation), <math>\frac{v^2}{c^2}</math> will equal one, and since that would leave one minus one in the denominator, there wou ...

The '''solar mass''' is a [[unit of measurement]] of [[mass]]. It is equal to the mass of the [[Sun]], about 332,950 times the mass of the [[Earth]], ...

One of the [[angle]]s of a [[right triangle]] is always equal to 90 [[degree (geometry)|degrees]]. This angle is the [[right angle]]. The ...s that the [[area]] of a [[square (geometry)|square]] on the hypotenuse is equal to the [[sum]] of the areas of the squares on the legs. In this picture, th ...

...ple, 2 is the square root of 4, because 2×2=4. Only numbers bigger than or equal to zero have real square roots. A number bigger than zero has two square ro ...efer most likely to the base of a square. As the sides of a square are all equal, the word radix may be interpreted as side of a square, even not literally ...