An area of Maths where numbers are represented by letters.
100
What's the meaning of 'diameter'?
A straight line passing through the centre of a circle, connecting two points on the circumference.
100
What's an 'edge'?
Where two surfaces join or intersect.
100
What are 'inverse operations'?
Opposite or reverse operations. Subtraction is the inverse of addition.
100
What's a 'prime factor'?
A factor that is also a prime number. The factors of 12 are; 1,2,3,4,6,12. The prime factors of 12 are 2 and 3.
200
What's an 'arc'?
A section of a curve, part of a circle.
200
What's a 'composite number'?
A number with more than two factors.
200
Describe an 'exterior angle'.
The angle on the outside of a polygon when one side is extended.
200
What's a 'hectare'.
A metric unit used to measure area. A 'hectare' is 10,000 square metres.
200
Describe 'origin'.
The point of intersection of the 'x-axis' and the 'y-axis' on a coordinate plane. The coordinates of the origin are (0,0).
300
What's an 'addend'?
Any number used to get the sum or total. In 3 + 4 = 7, 3 and 4 are 'addends'.
300
Describe a 'chord'.
A straight line joining two points on the circumference of a circle.
300
What does 'equiangular' mean?
Having all angles equal.
300
What's a 'formula'?
A mathematical rule ususally written as an equation, describing a relationship between quantities. The 'formula' for the area of a circle = pi x radius x radius.
300
What's a 'numeral'?
A 'symbol' used to represent a number. We most commonly use 1,2,3,4,5,6,7,8,9,10. But we could use I,II,III,IV,V,VI,VII,VIII,IX,X.
400
What does 'congruent' mean?
Having the same size and the same shape.
400
Describe a 'decahedron'.
A 10-sided 'polyhedron' (3-D shape with plane faces).
400
What is an 'equation'?
A mathematical statement containing an equals sign, to show that two expressions are equal.
400
Describe 'geometry'.
An area of mathematics dealing with solids, surfaces, points, lines, curves and angles, and their relationships in space.
400
What's a 'perfect number'?
A number that is equal to the sum of it's proper divisors. An example is 6. 1+2+3=6, 1,2 and 3 are 'proper divisors' of 6.
500
What's an 'axis'?
A real or imaginary reference line. Examples include 'axis of symmetry' - an imaginary mirror line, 'x-axis' - the horizontal reference line of a graph.
500
Describe a 'dodecahedron'.
A regular polyhedron with 12 faces that are all congruent, regular pentagons.
500
Describe 'expanded notation'.
A way of writing numbers to show place value. 546 is 500+40+6.
500
What is 'mass'?
The quantity of 'matter' in an object. NOT weight, as weight changes with gravity. A brick is weightless in space but has the same 'mass' as on earth.
500
Describe a 'proper divisor'.
All positive divisors of a number except the number itself. For example the 'proper divisors' of 18 are 1,2,3,6 and 9.