At the end of the lesson, the students should be able to know how to calculate perimeter and area of a parallelogram.

A parallelogram is a **quadrilateral **in which both pairs of opposite sides are **parallel.** The perimeter of a parallelogram can be calculated by using a formula.

Perimeter is 2 times the (base + side length)

P = 2 (b +s)

The area of a parallelogram can be calculated by using a formula

Area = base × height

A = b × h

(The height is always perpendicular to the base)

__Example 1__

Find the area of these parallelograms

__Solution__

a)A = h × b b) A = h × b

=4cm × 7cm = 3.5 × 3.1

=**28cm ^{2}** =

c)A = h × b

=3cm × 15cm

= **45cm ^{2}**

__Example 2__

Find the area and perimeter of a parallelogram whose base is 5cm and height 7cm.

__Solution__

Area of parallelogram = height × base

= 7cm × 5cm

= 35cm^{2}

Perimeter of the parallelogram = 2(base + height)

= 2 (5 + 7) cm

= 2 × 12cm

= **24cm**

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