mathematics

1. INNOVATIVE LESSON PLAN
RENJINI K.R
B.Ed MATHEMATICS
REG NO: 13304009

2. Area of Parallelograms
Standard 8

3. Goal
Find the area of parallelograms.

4. Key Vocabulary
Base of a parallelogram
Height of a parallelogram
Parallelogram
Rhombus

5. Parallelogram
A parallelogram is a quadrilateral
where the opposite sides are
congruent and parallel.
A rectangle is a type of parallelogram,
but we often see parallelograms that
are not rectangles (parallelograms
without right angles).

6. The Base of a Parallelogram
Either pair of parallel sides of a
parallelogram are called the bases of the
parallelogram.
base
base

7. The Height of a Parallelogram
The shortest distance (perpendicular distance)
between the bases of a parallelogram is called
the height of the parallelogram.
The height of the parallelogram is always
perpendicular to the bases.

8. Area of Parallelogram
What is the area
of this parallelogram?
b=base
h=height

9. Area of Parallelogram
What is the area
of this parallelogram?
b=base
CUT HERE!
h=height

10. Area of Parallelogram
What is the area
of this parallelogram?
MOVE TO HERE!
b=base
h=height

11. Area of Parallelogram
It’s the same as
the area of this rectangle
h=height
b=base

12. Area of Parallelogram
Arearectangle= base x height
(perpendicular height h)
h=height
b=base

13. Area of Parallelogram
Areaparallelogram = base x height
(perpendicular height h)
b=base
h=height

14. Area of Parallelogram
b
h
Words:
Area =(base)(height)
Symbols: A = bh
Very Important: The height must be perpendicular to the base.

15. Example 1 Find the Area of a Parallelogram
Find the area of the parallelogram.
SOLUTION
Use the formula for the area of a parallelogram.
Substitute 9 for b and 6 for h.
A = bh Formula for the area of a parallelogram
= (9)(6) Substitute 9 for b and 6 for h.
= 54 Multiply.
The parallelogram has an area of 54
square meters.
ANSWER