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Properties of 2-D Shapes Equilateral Triangle Isosceles Triangle Right-Angled Triangle Scalene Triangle Quadrilateral Rectangle Square Oblong Parallelogram Trapezium Rhombus Kite Regular Pentagon Regular Hexagon Regular Octagon Regular Decagon Circle

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Equilateral Triangle All three sides are the same length and all three angles are equal. Key Features Lines of Symmetry? Rotational Symmetry? Three. Order 3.

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Isosceles Triangle A triangle with two equal sides and two equal angles. Key Features Lines of Symmetry? Rotational Symmetry? One. None.

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Scalene Triangle A triangle with three different sides and three different angles. Key Features Lines of Symmetry? Rotational Symmetry? None.

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Right-Angled Triangle A triangle with one right-angle. Key Features Lines of Symmetry? Rotational Symmetry? Only if it’s an isosceles triangle - one line.isosceles triangle None. Can a Triangle be Right-Angled and Isosceles?Isosceles Yes.

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Quadrilateral A shape with four sides. Key Features Lines of Symmetry? Rotational Symmetry? It depends on what sort of quadrilateral it is. Names of Special Quadrilaterals RectangleRectangle, Square, Parallelogram, Trapezium, Rhombus, Kite.SquareParallelogramTrapeziumRhombusKite

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Rectangle A quadrilateral with four right-angles. Opposite sides are the same length.quadrilateral Key Features Lines of Symmetry? Rotational Symmetry? Two, unless the rectangle is a square.square Order 2, unless the rectangle is a square.square Is a Rectangle a Parallelogram?Parallelogram Yes, because both pairs of opposite sides are parallel.

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Square A quadrilateral with four equal sides and four right-angles.quadrilateral Key Features Lines of Symmetry? Rotational Symmetry? Four. Order 4. Is a Square a Rectangle?Rectangle Yes, because it’s a quadrilateral with four right-angles. Is a Square a Parallelogram?Parallelogram Yes, because both pairs of opposite sides are parallel. Is a Square a Rhombus?Rhombus Yes, because it’s got four sides all the same length.

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Parallelogram A quadrilateral with opposite sides that are parallel and the same length.quadrilateral Key Features Lines of Symmetry? Rotational Symmetry? Only if it’s a rectangle, a square or a rhombus.rectanglesquare rhombus Order 2.

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Oblong A rectangle which is not a square.rectanglesquare Key Features Lines of Symmetry? Rotational Symmetry? Two. Order 2. Is an Oblong a Parallelogram?Parallelogram Yes, because both pairs of opposite sides are parallel.

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Trapezium A quadrilateral with just one pair of parallel sides.quadrilateral Key Features Lines of Symmetry? Rotational Symmetry? Only if it’s an isosceles trapezium. None.

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Rhombus A quadrilateral with four equal sides.quadrilateral Key Features Lines of Symmetry? Rotational Symmetry? Two. Order 2. Is a Rhombus a Parallelogram?Parallelogram Yes, because both pairs of opposite sides are parallel.

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Kite A quadrilateral with two pairs of adjacent sides that are equal.quadrilateral Key Features Lines of Symmetry? Rotational Symmetry? One. None.

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Regular Pentagon A shape with five equal sides and five equal angles. Key Features Lines of Symmetry? Rotational Symmetry? Five. Order 5.

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Regular Hexagon A shape with six equal sides and six equal angles. Key Features Lines of Symmetry? Rotational Symmetry? Six. Order 6.

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Regular Octagon A shape with eight equal sides and eight equal angles. Key Features Lines of Symmetry? Rotational Symmetry? Eight. Order 8.

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Regular Decagon A shape with ten equal sides and ten equal angles. Key Features Lines of Symmetry? Rotational Symmetry? Ten. Order 10.

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Circle Every point on the circumference is the same distance from the centre. Key Features Lines of Symmetry? Rotational Symmetry? Infinite. Order infinity.

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