KS2 SATs Reasoning: Radius, Diameter and Circumference
The radius goes from the centre of a circle to its edge; the diameter goes right across through the centre, so it is twice the radius. Shelly the turtle finds the diameter of a circle with a 6 cm radius (12 cm), then you find the radius of a circle with an 18 cm diameter yourself. A regular KS2 SATs geometry question.
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2:03KS2 SATs Reasoning: Missing Angles on Lines and Around a Point
Angles on a straight line add up to 180°, and angles around a point add up to 360°. Leo the lion finds the missing angle next to 125° on a straight line (55°), learns that vertically opposite angles are equal, then you find the missing angle around a point yourself. A regular KS2 SATs reasoning question.
1:54KS2 SATs Reasoning: Area of Triangles and Parallelograms
A triangle is half of a rectangle, so its area is ½ × base × height: a triangle 8 cm across and 5 cm high has an area of 20 cm². A parallelogram is base × height. Ellie the elephant shows why, using the perpendicular height, then you find the area of a triangle with a 10 cm base and 7 cm height yourself.
2:00KS2 SATs Reasoning: Reading Pie Charts
A pie chart shows how a total is shared out. Fizz the fox reads a pie chart of 24 children’s favourite sports: the swimming slice is a quarter of the circle (90°), so a quarter of 24 children chose it, which is 6. Then find how many animals a 120° slice stands for yourself. A frequent KS2 SATs statistics question.