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)
Find the area of these parallelograms
a)A = h × b b) A = h × b
=4cm × 7cm = 3.5 × 3.1
=28cm2 = 10.85cm2
c)A = h × b
=3cm × 15cm
Find the area and perimeter of a parallelogram whose base is 5cm and height 7cm.
Area of parallelogram = height × base
= 7cm × 5cm
Perimeter of the parallelogram = 2(base + height)
= 2 (5 + 7) cm
= 2 × 12cm