4.1.5

Quadrilaterals

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Quadrilaterals

Angles in a quadrilateral (a 4 sided shape) add up to 360°.

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Rectangle

  • A rectangle is a quadrilateral with four right angles.
  • Its diagonals are the same length.
  • It has rotational symmetry of order 2 and two lines of symmetry.
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Square

  • A square is a rectangle with sides all the same length.
  • It has rotational symmetry of order 4 and four lines of symmetry.
  • Its diagonals are the same length and cross at right angles.
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Parallelogram

  • A parallelogram has two pairs of parallel sides which are the same length and two pairs of equal angles which are opposite each other.
  • It has rotational symmetry of order 2.
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Rhombus

  • A rhombus is a parallelogram with all sides the same length.
  • It has two lines of reflectional symmetry and its diagonals cross at right angles.
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Kite

  • The top two sides are the same length. The bottom two sides are the same length.
  • The angles on each side are equal. Its diagonals cross at right angles.
  • There is only one line of symmetry.
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General trapezium

  • A general trapezium has one pair of parallel sides and no symmetry.
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Isosceles trapezium

  • A trapezium has one pair of parallel sides.
  • An isosceles trapezium has sloping sides the same length and has one line of reflectional symmetry.

Jump to other topics

1Number

1.1Place Value

1.2Factors & Multiples

1.3Operations

1.4Fractions, Decimals & Percentages

1.5Growth & Decay

1.6Measurements & Units

1.7Accuracy

2Algebra

3Ratio, Proportion & Rates of Change

4Geometry & Measures

5Probability

6Statistics

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