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the maths standard 5 > Maths Vocabulary > Flashcards

Maths Vocabulary Flashcards

1
Q

What is an acute angle?

A

An angle less than 90 degrees.

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2
Q

What is a right angle?

A

An angle of 90 degrees.

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3
Q

What is an obtuse angle?

A

An angle greater than 90 degrees and less than 180 degrees.

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4
Q

What is a reflex angle?

A

An angle greater than 180 degrees.

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5
Q

What does BIDMAS mean and what does it stand for?

A

BIDMAS is the order of operations you do a calculation in. It stands for

Brackets

Indices

Division

Multiplication

Addition

Subtraction

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6
Q

What is an angle bisector?

A

A line that cuts an angle in half.

You should know how to construct one using a pair of compasses and a ruler.

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7
Q

What does consecutive mean?

A

Following on immediately from the term before

e.g. 3,4,5,6 are consecutive numbers

3,6,9,12 are consecutive multiples of 3.

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8
Q

What does congruent mean?

A

Exactly the same size and shape.

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9
Q

What does correlation mean?

A

The degree of relationship between two sets of data.

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10
Q

What is a cube number?

A

A number that is another whole number cubed e.g.

13 = 1 x 1 x 1 = 1

23 = 2 x 2 x 2 = 8

33 = 3 x 3 x 3 = 27

so 1, 8 and 27 are the first three cube numbers.

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11
Q

What is a cube root?

A

The number that, when cubed, equals the number given

e.g. the cube root of 8 is 2 since 23=8.

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12
Q

What is a denominator?

A

The denominator is the bottom number of a fraction.

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13
Q

What is an edge of a 3D shape?

A

An edge is a line where two faces meet.

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14
Q

What does equidistant mean?

A

The same distance away from two points.

e.g. A is equidistant from B and C

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15
Q

What is an exterior angle?

A

The angle formed between a polygon and a line extended fron one of its sides.

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16
Q

What is a face of a 3D shape?

A

A face is a flat surface on the solid.

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17
Q

What is a factor?

A

A factor is a number that divides into another number exactly.

e.g. 6 is a factor of 18

2 is a factor of 40

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18
Q

What does expanding an expression mean?

A

Multiplying out the brackets

e.g. 3(y + 1) = 3y + 3

19
Q

What does factorising an expression mean?

A

Putting it into brackets.

e.g. 6z - 3 = 3(2z - 1)

20
Q

What is the highest common factor (HCF) of two numbers?

A

The highest common factor is the biggest number that divides into both.

e.g. the HCF of 30 and 12 is 6

If you list the factors of 30 and 12, 6 is the largest number in both lists.

21
Q

What is an improper fraction?

A

An improper fraction has a larger numerator than denominator.

22
Q

What is an integer?

A

A positive or negative whole number.

23
Q

What is an interior angle?

A

The angle formed between two adjacent sides of a polygon.

24
Q

What does the intersection of two graphs mean?

A

The point where they cross.

25
Q

What is a line of best fit?

A

A straight line drawn on a scatter graph that fits the data as closely as possible.

26
Q

What is the lowest common multiple (LCM) of two numbers?

A

The smallest number that they both go into

e.g. the LCM of 6 and 8 is 24

If you write out the times tables of 6 and 8, 24 is the smallest number in both lists.

27
Q

What is a multiple?

A

The multiples of a number are those numbers that can be divided by it; the numbers in its times table.

e.g. the multiples of 7 are

7, 14, 21, 28, 35,…

28
Q

What is a numerator?

A

The number on the top of a fraction.

29
Q

What is the origin on a graph?

A

The place where the axes cross. The point (0,0).

30
Q

What does parallel mean?

A

Parallel lines have a constant distance between them and will never cross. They have the same gradient.

31
Q

What does perpendicular mean?

A

Perpendicular lines cross at a right angle.

32
Q

What is a polygon?

A

A polygon is a 2D shape with 3 or more straight sides.

33
Q

What is a prime number?

A

A prime number has exactly two factors, itself and 1. The first five prime numbers are

2,3,5,7,11

1 is not a prime number.

34
Q

What is a reciprocal?

A

The reciprocal of a number is 1 divided by the number.

To find the reciprocal of a fraction, flip it upside down.

e.g. the reciprocal of 2 is 1/2

the reciprocal of 4/7 is 7/4

35
Q

What is a regular polygon?

A

A regular polygon has all side lengths and angles the same.

36
Q

What does similar mean?

A

Similar shapes are exactly the same shape but can be different sizes.

37
Q

What is a square number?

A

A number that is another whole number squared e.g.

12 = 1 x 1 = 1

22 = 2 x 2 = 4

32 = 3 x 3 = 9

so 1, 4 and 9 are the first three square numbers.

38
Q

What is a square root?

A

A square root is the number that, when squared, equals the number given.

e.g. The square root of 4 is 2 since 22 = 4

39
Q

What is a triangle number?

A

A number that can be represented by a traingular arrangement of dots. A number in the sequence

1, 1+2, 1+2+3, 1+2+3+4 etc.

40
Q

What is a vertex?

A

A vertex is a corner of a 3D shape.

41
Q

What is a mixed number?

A

A mixed number has a whole number part and a fractional part.

42
Q

What is a hypotenuse?

A

The hypotenuse is the longest side of a right angled triangle; the side opposite the right angle.

43
Q

What is cumulative frequency?

A

The cumulative frequency is the sum of all the frequencies so far in a distribution. It is a ‘running total’.

the maths standard 5 (41 decks)

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