2D Shapes and properties: Maths

Polygon: What is polygon(Find the answers examples)-Google

A plain figure with at least three straight sides and angles.

Complete the table below: you must cut and paste the correct

image and definition for each shape. Use the internet to help if

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Triangles 3 sides The interior angles add to 180 o	Quadrilaterals 4 sides The interior angles add to 360 o	Other sided Polygons
Right angled triangle   It could be classified as a special kind of rhombus with all four interior angles equal to 90 o or it could also be classified  OR it could be classified as a special kind of rectangle with all four sides equal in length. Both pairs of opposite sides are parallel. All sides are equal in length. All interior angles equal 90 o Lines of symmetry: 4 Order of rotational symmetry: 4 The diagonals bisect each other at 90 o and are equal in length The diagonals bisect both pairs of opposite angles both pairs of interior opposite angles	Square   It is a special kind of parallelogram with all four sides of equal length. Both pairs of opposite sides are parallel. Both pairs of opposite sides are equal in length. Both pairs of opposite angles are equal. All sides are equal in length. Lines of symmetry: 2 Order of rotational symmetry: 2 The diagonals bisect each other at 90 o The diagonals bisect both pairs of opposite angles.	Pentagon 5 sided polygon Regular polygon 5 equal sides 5 equal interior angles where each angles is 108 o Lines of symmetry: 5 Order of rotational symmetry: 5
Isosceles triangle It is a quadrilateral with two pairs of adjacent sides equal and one interior angle that is more than 180 o One interior reflex angle Two pairs adjacent sides of equal length Lines of symmetry: 1 Order of rotational symmetry: 0	Rectangle   It could be classified as a special kind of parallelogram that has all four angles equal to 90 o. Both pairs of opposite sides are parallel. Both pairs of opposite sides are of equal length. Both pairs of opposite angles are equal. All interior angles are equal to 90 o Lines of symmetry: 2 Order of rotational symmetry: 2 Diagonals are equal in length. Both diagonals bisect each other.	Hexagon 6 sided polygon Regular polygon 6 equal sides 6 equal interior angles where each angles is 120 o Lines of symmetry: 6 Order of rotational symmetry: 6
Equilateral triangle   A triangle that has three equal sides The angles all equal to 60 o There are 3 lines of symmetry The order of rotational symmetry is 3.	Parallelogram   It is a quadrilateral with both pairs of opposite sides parallel. Both pairs of opposite sides are parallel. Both pairs of opposite sides are equal in length. Both pairs of opposite angles are equal. Lines of symmetry: 0 Order of rotational symmetry: 2 Both diagonals bisect each other.	Heptagon 7 sided polygon Regular polygon 7 equal sides 7 equal interior angles where each angles is 128.6 o Lines of symmetry: 7 Order of rotational symmetry: 7
Isosceles Trapezium  It is a special kind of trapezium with one opposite pair of sides that are equal in length Only one pair of parallel lines (bases) The non-parallel, opposite sides are the same length The angles on either side of the bases are the same size The diagonals the same length Lines of symmetry: 1 Order of rotational symmetry: 0	Rhombus   A rhombus is a parallelogram that has all equal sides The opposite sides are parallel and the opposite angles are equal. It is known as a parallel shape or in others words, an equilateral quadrilateral.	Octagon 8 sided polygon Regular polygon 8 equal sides 8 equal interior angles where each angles is 128.6 o Lines of symmetry: 8 Order of rotational symmetry: 8
Trapezium   A trapezium is a quadrilateral with one pair of sides that are parallel. It is a shape with unequal sides as for the base and top.	Arrowhead   A quadrilateral where one interior angle is more than 180o The two sides are equal leading to a point at the centre and top of the shape. There are also two lines that go inside the shape which are also equal, making it looking like an arrow.	Decagon   10 sided polygon Regular polygon 10 equal sides 10 equal interior angles where each angles is 144o Lines of symmetry: 10 Order of rotational symmetry: 10
	Kite A kite is a quadrilateral It is a shape where a group of two sides that are adjacent to each other have the same equal.	Nonagon 9 sided polygon Regular polygon 9 equal sides 9 equal interior angles where each angles is 140 o Lines of symmetry: 9 Order of rotational symmetry: 9