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You have known about the objects that
shaped rectangle around you. Consider the
problem below!
Picture 1.1
Problem 1
Picture 1.1 is a rectangular table at Adi’s home. A week ago the table’s glass broke. Therefore, Adi's father bought a new glass that has the same shape and
size to the table. How many ways can Adi's father
put the glass exactly on the table? The tools you need are:
1. Transparent paper
2. Paper
3. Scissors
4. Ruler
5. String
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A. Based on the above problems, do the activities and answer the questions below!
1. Draw the model of glass on transparent paper. Then give the name and cut the model of glass according to its sides.
2. Draw the model of glass on cardboard, then give the name to its sides. (model of table has the same size as the model of glass and is called a frame).
3. How many ways that model of glass can be placed on the
frame?………
……… ………
4. Which side of the model of glass that can occupy to the bottom side of the frame?
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5. Which side of the model of glass that can occupy to the left side of the frame?
……… ……… 6. Based on your answer to question number 5 and 6, what can you conclude
about the sides of the model of glass?
……… ……… ……….. 7. Write down the existing angles on the model of glass that you have!
……… ……… ……….. 8. What is the relationship between the angles? Explain by using the method
of occupying the frame or by your own way!
……… ……… ……….. 9. Based on your answer to question number 7 and 8, what can you conclude
about the angles of the model of glass?
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B. Do the following activities with your group and answer the questions below!
Adi’s mother ask Adi to put a vase on the table. Adi want to put the vase in right position, in order that the table looks good.
a. In your opinion, what position on the table will be chosen by Adi? ……….
b. How can Adi put that vase to the chosen position?
c. What thing do you find based on answers of a and b which related to the properties of rectangle?
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THE PROPERTIES OF RECTANGLE IN TERMS OF SIDES, ANGLES AND DIAGONAL ARE:
1. ………
……… ……… ………..
2. ………
……… ……… ………
3. ………
……… ……… ………..
4. ………
……… ……… ……….. BASED ON YOUR
ANSWERS FROM THE ACTIVITY A AND B
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Look at the picture!
Based on the properties of the rectangle that you have found, do you know which picture that including the rectangle? Give a reason!
Based on the properties of the rectangle that you find, write in your own words the definition / meaning
