ຂຽນເມື່ອ: ພ.ພ.. 17, 2012
| ມີ
1 ຄຳເຫັນ
ແລະ
0 trackback(s)
3. AREA
Area is the extent of a surface. It is 2-dimensional. Area
is often expressed using the word "square" + the distance.
For example, if a room is 10 metres long and 5 metres wide,
it is 50 square metres (50 sq. m). But we can also use the
distance + the figure 2. Then we would write 50m2.
Here are two examples:
My table is 3 metres long x 2 metres wide:
area = 6 sq.m, or
area = 6m2
My town is 3 miles x 4 miles:
area = 12 sq. miles
We often measure the area of land using:
hectare = 10,000 square metres
acre = 4,840 square yards
Warning!
There is a difference between "square metres" and "metres
square". If my room is 10 feet x 10 feet, it is 100 square
feet but 10 feet square. We can only say this when the
length and the width are the same.
ກັອບມາ ຈາກ ກ່ອງເມວ
ບໍ່ຮູ້ ເປັນຫັຍງ ອ່ານ ແລ້ວ ບໍ່ຈື່