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Quadrilaterals

Sides, parallel sides, angles and diagonals of quadrilaterals; the angles add up to 360°. Read one part at a time and tap “I know this”. Then test yourself in the quiz.

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Properties of quadrilaterals

QuadrilateralProperties
squareSides: all equal; both pairs of opposite sides parallel. Angles: 4 × 90°. Diagonals: equal, bisect at right angles.
rectangleSides: opposite sides equal and parallel. Angles: 4 × 90°. Diagonals: equal, bisect each other.
rhombusSides: all equal; opposite sides parallel. Angles: opposite equal. Diagonals: bisect at right angles.
parallelogramSides: both pairs of opposite sides equal and parallel. Angles: opposite equal. Diagonals: bisect each other.
trapeziumSides: exactly one pair of parallel sides.
kiteSides: two pairs of adjacent sides equal. Angles: one pair of opposite angles equal. Diagonals: cross at 90°.

A square, rectangle and rhombus are special parallelograms: they all have two pairs of parallel sides.

Rule

The angles of a quadrilateral always add up to 360°.

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Remember this and test yourself

Remember this: your summary
  • Angles of a quadrilateral = 360°.
  • Square and rhombus: 4 equal sides.
  • Parallelogram: opposite sides parallel and equal; opposite angles equal.
  • Trapezium: exactly one pair of parallel sides.
  • Kite: two pairs of adjacent sides equal.

Write these points in your book. Read them again the night before the test.

Memory trick

Four corners, one full turn: 360°.

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Important words

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Test yourself · Part 2

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