2. SHAPES
1)
2)
This is a
circle. It has
no sides or
corners
This is a
triangle. It has
three sides and
three corners.
3. 3)
This is
rectangle. It has
four corners and
four sides. Its
opposite sides
are equal.
4)
This is a square.
It has four
corners and four
sides. All its
sides are equal.
5. LESSON TEMPLATE
Name of the teacher :SACHITHRA.S Period :
Name of the school : Time :
Standard : VII Date :
Subject : Mathematics Strength :
Unit : Area of quadrilateral Average age : 13+
Topic : Area of parallelogram
CURRICULAR STATEMENTS
To knows one side of the parallelogram is of length ‘b’ and the height from this
side is ‘h’. Then the area of to find the parallelogram is ‘bh’.
CONTENT ANALYSIS
Terms : Triangle, Parallelogram, Area
Facts :1) A triangle has three sides and corners.
2) The area of the triangle is 1/2bh
3) The opposite sides of a parallelogram are equal and pararrel.
6. 4) We get two equal triangles by drawing a diagonal in a
parallelogram.
5) The sum of this two triangle is the area of of a parallelogram.
Concept : The concept of area of Parallelogram
Equation : Area of parallelogram = bh
Symbols: b= a side of a parallelogram
h = height
LEARNING OUTCOME
The students will be able to,
1) recalls the knowledge of information
related to triangle, Parallelogram,
diagonal base, height and area.
2) recognizes the different geometrical
figures of quadrilaterals
3) exemplifying the different geometrical
quadrilaterals
4) comparing the area of triangle and
parallelogram
5) inferring about the area of parallelogram
6) applies the above concept in familiar
situation
7) attributing the proportionality of base,
height and area of parallelogram
8) to checking the value of area of different
parallelogram
7. 9) generate the alternate way of finding the
area of parallelogram
10) to perform computing skill in finding the
area of parallelogram
11) accept the beauty of mathematical
principles
PRE-REQUISITES
The pupils knows about,
1) triangle
2) parallelogram
3) base
4) height
5) area
TEACHING LEARNING RESOURCES
1) Models of parallelogram
2) Ordinary class room teaching aids
8. Class room interaction procedure Responses
INTRODUCTION
ACTIVITY NO:1
Teacher showed a figure of a parallelogram. Then
asked the students what is the peculiarities of that
figure.
Base=3cm,height=2cm. Then what is the area of a
triangle?
PRESENTATION
ACTIVITY NO:2
The teacher divides the whole class into four equal
groups. Then each group has been given different
measures of parallelogram.
3cm 4cm
Opposite sides are equal and
pararrel.
Area=1/2*3*2
9. Classroom interaction procedure Responses
5cm 6cm
The teacher asked the students to draw a diagonal
in this parallelogram and find the newly obtained
geometrical figure. And find that areas. Basis of
that to construct a table.
3cm 4cm
6cm
5cm
10. Classroom interaction procedure
Responses
Group
Area
Area of the
parallelogram
Triangle
1
Triangle
2
1
2
3
4
1/2*3*2
1/2*4*3
1/2*5*4
1/2*6*5
½*3*2
1/2*4*3
1/2*5*4
1/2*6*5
1/2*3*2+1/2*3*2
1/2*4*3+1/2*5*4
1/2*5*4+1/2*5*4
1/2*6*5+1/2*6*5
On the basis of this what is the peculiarities of these
parallelogram?
We get the area of the
parallelogram by adding the
areas of these two triangles.
But the easy way to find the
area of the parallelogram is
obtained by the
multiplication of the one side
of the parallelogram of the
length and the height from
that side.
11. Classroom interaction procedure Responses
The teacher gives notes to the students. That is, one side
of a parallelogram is of length ‘b’ and the height from
this side is ‘h’. then the area of parallelogram=’bh’
Teacher shows the chart.
AREA OF A PARALLELOGRAM
The area of a parallelogram is
the length of one side and the
distance to the opposite side. That is area
of a parallelogram= ‘bh’
APPLICATION
One side of the parallelogram is of length 8cm, and the
height from this side is 4cm.what is its area?
Measures are given?
What is the equation for finding the area of a
parallelogram?
Then find the area?
‘b’ and ‘h’
b=8cm
h=4cm
area of a parallelogram = bh
area=bh=8*4=32cm^2
12. REVIEW
What is the equation for finding the area of parallelogram?
FOLLOW UP ACTIVITIES
Fill the tables with suitable answers
b h area
1 5 …. 30
2 …. 11 44
3 18 19 ….
4 7 …. 63
