Page 229 - Math Smart - 7

Quadrilaterals
You have learnt about rectangles and squares. Let us recall a few other
quadrilaterals such as the parallelogram, rhombus, kite and the trapezium.

The table below shows the basic properties of these quadrilaterals.

Quadrilateral Property
Rectangle a Two pairs of parallel sides
-\-w—
J L AB H DC, AD n BC
Opposite sides are equal.
AB = DC, AD = BC
n 1 h r

Square Two pairs of parallel sides
AB H DC, AD H BC

All sides are equal.
AB = BC, CD = AD

Parallelogram Two pairs of parallel sides
AB H DC, AD H BC
Opposite sides are equal.
AB = DC, AD = BC

Rhombus Two pairs of parallel sides
A. \* jD
AB II DC, AD a BC
All sides are equal.
AS = fiC = CD = AD

Kite No parallel sides.

Adjacent sides are equal.
AB = AD, CB = CD

Trapeziums One pair of parallel sides.

AD//SC