The Use of Parallelogram Area

1
The Use of Parallelogram Area

• The area of a parallelogram
• its base times its height

S a h
? ? ???
2
Work out the areas in mind
1. The base is 25dm, and the height is 4dm.
2. The base is 0.3m, and the height is 0.2m.
3. Both of the base and the height are 0.6cm.
3
Fill in the blanks
1) 2.5m² ______dm²
250
2) 300cm² ______ dm²
3
3) 0.82m² ______ dm²
82
4) 53dm² ______ m²
0.53
5) 82cm² ______ dm²
0.82
4
The height of a parallelogram its area divided
by its base
h S a
The base of a parallelogram its area divided by
its height
a S h
5
Work out the area of the combinatorial figure

1) 4.542 2) 4.544.54 3) 4.5 (44)
4cm
36cm²
4cm
4.5cm
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1. How many parallelograms are there in the
figure? ( )
2
2. Whats the relationship between them?
Both of their bases and heights are the same.
3. Whats the area of each parallelogram? (
)
4cm²
7
Conclusion
If two parallelograms have the same base and the
same height, their areas are the same.