What is a decagon?

10 sided shape

What is a multiple?

The multiplication table of...
eg multiples of 5 are 5, 10, 15, 20 etc

What is an acute angle

Angle smaller than 90

What is a prime number?

Has exactly 2 factors: 1 and
ITSELF
eg, 2, 3, 5, 7, 11, 13, 17 ... etc

What is an obtuse angle?

Between 90 and 180

What is a prime factor

A factor that is also a prime
number

What is a reflex angle?

Bigger than 180

What does the word 'percent'
mean

Per = 'out of'
Cent = '100'

What is a pentagon?

5 sided shape

What is a square number?

1, 4, 9, 16, 25, 36 etc

What is a hexagon?

6 sided shape

What is an even number?

Any number ending in 0, 2, 4, 6
or 8

What is a heptagon?

7 sided shape

What is an odd number?

Any number anding in 1, 3, 5, 7
or 9

What is a nonagon?

9 sided shape

What is a factor?

A number that divides exactly
into...
eg factor of 12 are 1, 2, 3, 4, 6, 12 because they all divide exactly into 12

What are parallel lines?

Straight lines that are always
the same distance apart from each other and therefore, never cross.
Eg __________ __________

How many millimetres in a
centimetre?

10mm = 1cm

What is an octagon

8 sided shape

What is a perimeter?

The distance around the edges of
a shape

How many centimetres in a metre?

100cm = 1m

What is a net?

A 3D shape unfolded flat

What is an isosceles triangle

A triangle with 2 equal sides
AND 2 equal angles

What is a median?

The middle value in a list when
the values are placed in order of size

How many metres in a kilometre?

1000m = 1km

What is a line of symmetry

A mirror line

What is a scalene triangle?

A triangle in which all the
sides are different and all the angles are different

What is a mean?

(Add all values)/Number of
values

What is a trapezium?

A quadrilateral that has only 1
pair of parallel lines.

What is a tally chart?

Use marks in groups of 5 to
count
eg: 2: ////
3: //
4: ///

What is a parallelogram?

A 'squashed' rectangle, leanign
to one side.

What does it mean when shapes
tesselate?

They fit together with no gaps

What is the probability of an
impossible event

P(not possible) = 0

How do you find the range of a
list of values?

Largest  Smallest

What is a rhombus?

A 'squashed' square leaning to
one side. A parallelogram with all sides the same length.

What is the probability of an
even that is certain?

P(certain) = 1

What is a mode?

The value which occurs most
often
