Properties of 2-D Shapes

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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
Key Features
All three sides are the same lengthand all three
angles are equal.
Lines of Symmetry
Three.
Rotational Symmetry
Order 3.
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Isosceles Triangle
Key Features
A triangle with two equal sides and two equal
angles.
Lines of Symmetry
One.
Rotational Symmetry
None.
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Scalene Triangle
Key Features
A triangle with three different sides and three
different angles.
Lines of Symmetry
None.
Rotational Symmetry
None.
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Right-Angled Triangle
Key Features
A triangle with one right-angle.
Can a Triangle be Right-Angled and Isosceles
Yes.
Lines of Symmetry
Only if its an isosceles triangle - one line.
Rotational Symmetry
None.
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Quadrilateral
Key Features
A shape with four sides.
Lines of Symmetry
It depends on what sort of quadrilateral it is.
Rotational Symmetry
It depends on what sort of quadrilateral it is.
Names of Special Quadrilaterals
Rectangle Square Parallelogram Trapezium
Rhombus Kite.
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Rectangle
Key Features
A quadrilateral with four right-angles.Opposite
sides are the same length.
Lines of Symmetry
Two unless the rectangle is a square.
Rotational Symmetry
Order 2 unless the rectangle is a square.
Is a Rectangle a Parallelogram
Yes because both pairs of opposite sides are
parallel.
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Square
Key Features
A quadrilateral with four equal sides and four
right-angles.
Lines of Symmetry
Four.
Rotational Symmetry
Order 4.
Is a Square a Rectangle
Yes because its a quadrilateral with four
right-angles.
Is a Square a Parallelogram
Yes because both pairs of opposite sides are
parallel.
Is a Square a Rhombus
Yes because its got four sides all the same
length.
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Parallelogram
Key Features
A quadrilateral with opposite sides that are
parallel and the same length.
Lines of Symmetry
Only if its a rectangle a square or a rhombus.
Rotational Symmetry
Order 2.
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Oblong
Key Features
A rectangle which is not a square.
Lines of Symmetry
Two.
Rotational Symmetry
Order 2.
Is an Oblong a Parallelogram
Yes because both pairs of opposite sides are
parallel.
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Trapezium
Key Features
A quadrilateral with just one pair of parallel
sides.
Lines of Symmetry
Only if its an isosceles trapezium.
Rotational Symmetry
None.
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Rhombus
Key Features
A quadrilateral with four equal sides.
Lines of Symmetry
Two.
Rotational Symmetry
Order 2.
Is a Rhombus a Parallelogram
Yes because both pairs of opposite sides are
parallel.
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Kite
Key Features
A quadrilateral with two pairs of adjacent sides
that are equal.
Lines of Symmetry
One.
Rotational Symmetry
None.
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Regular Pentagon
Key Features
A shape with five equal sides and five equal
angles.
Lines of Symmetry
Five.
Rotational Symmetry
Order 5.
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Regular Hexagon
Key Features
A shape with six equal sides and six equal angles.
Lines of Symmetry
Six.
Rotational Symmetry
Order 6.
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Regular Octagon
Key Features
A shape with eight equal sides and eight equal
angles.
Lines of Symmetry
Eight.
Rotational Symmetry
Order 8.
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Regular Decagon
Key Features
A shape with ten equal sides and ten equal angles.
Lines of Symmetry
Ten.
Rotational Symmetry
Order 10.
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Circle
Key Features
Every point on the circumference is the same
distance from the centre.
Lines of Symmetry
Infinite.
Rotational Symmetry
Order infinity.
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END OF PRESENTATION