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Map Scales and Scale Drawings
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. The drawing of maps are scaled down because the actual length is too long . The drawing length of buildings on a map is proportional to the real length Drawing Length and Actual Length: Measure the distance between the two points on a map with a rule A scale of 1cm : 100m shows […]
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Rotation and Reflection
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Rotational Symmetry . If an object can be rotated from the centre and look the same in under 360° Order of symmetry . How many times an object can be rotated and look the same after 360° Finding Rotational Symmetry: Trace the image and turn it, if it looks the same in under 360°, it […]
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Shape and Space – Volume
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Volume – the amount of space occupied by an object . Volume is usually measured in cm3 and m3 . 1m³ = 1000 Litre . 1000cm³ = 1 Litre Calculating Volume: . Volume in a cube and cuboid is find by multiplying length x width x height Example: Q) Find the volume of the tank with […]
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Shape and Space – Area of Compound Shapes
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Compound Shapes – A shape made up of two or more simple ones Split the compound shape into simple shapes Find the area of each shape and add them together Example: Q) Find the area of this compound shape By drawing a line, we can separate the compound shape into a rectangle and a square […]
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Shape and Space – Area for 3D Shapes
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3D Shapes: Surface Area . The sum of all the areas of the faces in the shape . A shape with three dimensions: length, width and height Draw a sketch of the net of the shape (all the shapes that make up the shape) Calculate the area of each shape and find the sum Example […]
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Shape and Space – Area for 2D Shapes
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Area for 2D Shapes Parallelogram: . Formula → base x height . base → length of bottom side . height → perpendicular length from bottom to top Trapezium: . A 2D shape where one pair of opposite sides are parallel . Formula → (a + b) / 2)) x height . a and b → the top and bottom sides . height → perpendicular […]
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Shape and Space – Properties of a Parallelogram
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Parallelogram . A 2D shape with opposite sides that are equal and parallel and opposite angles that are equal . Line AB = line DC and they are parallel (never meet) . Line AD = Line BC and they are parallel . Angle A = Angle C (A + C = 180°) . Angle B […]
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Data Handling – Averages
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Median – the middle number when all the numbers are arranged from smallest to biggest Example: Q) Find the median in this set of numbers: 4, 9, 5, 12, 10, 11 Arrange the numbers smallest to biggest The two numbers that lie in the middle are 9 and 10. Add both middle numbers and divide […]
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Algebra – Substitution, Expressions and Equations
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Substitution – putting numbers in place of letters Substituting into an equation: Put the value of the corresponding letter into the equation Use BIDMAS and expand the equation to find the answer Example: Q) a = 3 b = 2 c = -4 d = -2 Workout the value of ab – d + c […]
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Numbers – Analogue Clocks
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. Short and thick hand: hour hand . Long hand: minutes hand . Thin hand: seconds hand Key Terms: . O’clock → If the minute hand points at 12/0, the hour hand tells us what o’clock it is. e.g if the hour hand points at 5, the time is 5 o’clock . Quarter past → If the minute hand points at 3, it […]
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