Which shape has four equal sides and all right angles?
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Square
It is a special case of the rectangle.
💡 Did you know? All four corners are 90°.
12 questions · Maths & Logic
Geometric shapes are everywhere once you start to notice them: in road signs, in honeycomb patterns, in a football and in the floor plan of every house. The ancient Greeks already studied their properties, and to this day they form the alphabet of geometry. Some you recognise at a glance, while others differ only in fine details such as angles or side lengths. This pack leads through the most important flat shapes and polygons: recognise the square with four equal sides and the rectangle, the triangle and the round circle, the pentagon, the hexagon and the octagon, the slanted parallelogram and the rhombus, the trapezium with just one pair of parallel sides, the oval-stretched ellipse and the kite: recognise them by their corners, sides and symmetries, and afterwards look around the world with new eyes, because suddenly you will see shapes everywhere. From the tile pattern in the bathroom to the sign at the crossroads, the world turns into one big geometry book just waiting to be read.
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Square
It is a special case of the rectangle.
💡 Did you know? All four corners are 90°.
Rectangle
Opposite sides are equal.
💡 Did you know? A sheet of paper is a rectangle.
Triangle
Its interior angles add up to 180°.
💡 Did you know? It is the most stable basic shape in building.
Circle
The distance to the centre is the radius.
💡 Did you know? It has no corners.
Pentagon
The US defence building has this shape.
💡 Did you know? “Penta” is Greek for “five”.
Hexagon
Honeycombs are hexagonal.
💡 Did you know? Hexagons tile a plane without gaps.
Octagon
The stop sign is octagonal.
💡 Did you know? “Octo” is Greek for “eight”.
Parallelogram
Opposite sides are equal and parallel.
💡 Did you know? Rectangle and rhombus are special cases.
Rhombus
It looks like a tilted square.
💡 Did you know? The diamond in cards is a rhombus.
Trapezium
The two parallel sides differ in length.
💡 Did you know? Many bridge supports have this shape.
Ellipse
Planets orbit the Sun in ellipses.
💡 Did you know? It has two “foci”.
Kite
Two pairs of adjacent sides are equal.
💡 Did you know? Its diagonals are perpendicular.
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