KS2 Maths Revision Facts.pdf

perimeter, circumference, horizontal/vertical lines, parallel/perpendicular lines.
Roman numerals: I=1, V=5, X=10, L=50, C=100, D=500, M=1000.
Multiplication/division vocabulary: factor, common factor, prime number, composite number, prime factor, multiple, common multiple, square, cube.
Fractions/decimals/percentages: 1/100=0.01=1%, 1/20=0.05=5%, 1/10=0.1=10%, 1/5=0.2=20%, 1/4=0.25=25%, 1/2=0.5=50%, 3/4=0.75=75%.
Measurement conversions: 1cm=10mm, 1m=100cm, 1km=1000m, 1 mile=1.6km, 1kg=1000g, 1 litre=1000ml.
Angles: full turn=360°, half turn=180°, right angle=90°, acute angle<90°, obtuse angle>90°, reflex angle>180°.
3D shapes: square-based pyramid, triangular-based pyramid, triangular prism, volume=length x width x height.
The mean: add up numbers and divide by how many there are.
2D shapes: quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, decagon, polygon, regular, irregular.
Types of triangle: scalene, equilateral, isosceles.
Types of quadrilateral: parallelogram, trapezium, rhombus.
Area: amount of space inside a 2D shape, usually measured in cm2 or m2, area of triangle=(base x height) ÷ 2, area of parallelogram=base x height.
Co-ordinates: read along x axis then y axis.