Maths revision

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Area of triangle Area triangle = \(\frac{1}{2}\) x base x height
Area of a circle \[\pi\,r^2\]
Angles in a triangle add up to \[180\,^{\circ}\]
Circumference of a circle \[\pi\,d\]
Radius = Circumference = Diameter = Radius = 5cm Circumference = 31cm Diameter = 10cm
Area of a rectangle
Area of kite
Area of a Parallelogram
Volume cylinder Volume = Area of base (which is a circle) x height \[V=\pi\,r^2\,h\]
Volume of a Prism
Measurements km, m, cm, mm 1000m in 1km 100cm in 1m 10mm in 1cm
Measurements ml, l, g, kg, tonnes Millilitres and litres 1000ml in 1L Grams and Kilograms 1000g in 1kg 1000kg in 1 tonnes
Measurements (squared) 100mm\(^2\) in 1cm\(^2\) 10,000cm\(^2\) in 1m\(^2\) 1,000,000m\(^2\) in 1km\(^2\)
Measurements (cubed) 1,000mm\(^3\) in 1cm\(^3\) 1,000,000cm\(^3\) in 1m\(^3\) 1,000,000,000m\(^3\) in 1km\(^3\)
Conversions 1 mile = 1.6 km 1 inch = 2.5 cm 1 kg = 2.2 pounds
Area of a semi circle Find the area of the circle then halve it. \[\frac{\pi\,r^2}{2}\]
Area of a quarter circle Find the area of the circle then divide it by 4 \[\frac{\pi\,r^2}{4}\]
Angles on a straight line add up to \[180\,^{\circ}\]
Angles in a quadrilateral add up to \[360\,^{\circ}\]
Angles around a point add up to \[360\,^{\circ}\]
Alternate angles
Corresponding angles
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