If a number is divisible by 3,, it is divisible by 1 and itself as well., The perimeter of a polygon is, the sum of all its sides., The area of a triangle is calculated by, you multiply the base by the height and divide by 2., When you increase a quantity by 15%,, you add 15% of its original value to itself., If a fraction is simplified,, it has been rewritten in its lowest terms., The square of a negative number is, it becomes positive., When two lines are perpendicular,, they meet at a right angle., A quadratic equation has real solutions if, its discriminant is zero or positive., When the mean is greater than the median,, the data is skewed to the left., To calculate the probability of an event,, you divide the number of favourable outcomes by the total number of possible outcomes., The circumference of a circle is, the difference increases., A rational number is, π times the diameter., If the numerator of a fraction is zero,, it is equal to zero., The volume of a cuboid is found by, multiplying length × width × height., When two triangles are congruent,, they have exactly the same size and shape., The median of a data set is, the middle value when data is arranged in order., If two events are mutually exclusive,, the sum of their probabilities equals 1., The gradient of a line is, the ratio of the vertical change to the horizontal change., If a quadratic function opens upwards,, its vertex represents the minimum point., When a number is expressed as a percentage,, it is written as a number out of 100., The mode of a data set is, the value that occurs most frequently., When you subtract a negative number,, longer than either of the other two sides., The hypotenuse of a right triangle is, you find the solution that satisfies both equations., When solving simultaneous equations,, π × radius²., The area of a circle is, it cannot be written as a fraction., A number is irrational if, the two angles add up to 180°., If an angle is supplementary to another,, the set of all possible output values., The range of a function is, combining like terms and simplifying coefficients., When simplifying an algebraic expression,, zero., The probability of an impossible event is, a number expressed in decimal or fraction form..

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