For example, consider this first problem:
In a right triangle, given the length of the hypotenuse is 10 cm and the length of
one side at a right angle is 6 cm. How long is the third side ?
Then consider the second problem follows. :
One day Mr. Zaky went to the house of Mrs. Vina on a motorbike. From his
home, he must ride a bike in the west as far as 8 km. Then turn left at an angle of
90o and continue the journey as far as 6 km and came to the house of Mrs. Vina.
On his way back, Zaky not through the original path, but through the straight
path which directly connects the house of Mrs. Vina and the house of Mr. Zaky.
Explain how to measure the total distance traveled by Mr. Zaky for taking all
these trips?
Note that the first problem required little mathematical communication skills, such
as reading and writing mathematical ideas. This is different to the second problem.
In the second problem, students are trained to develop their communication skills
through reading the problem and understand it, then communicate mathematical
ideas into writing so that others can understand. To develop students' mathematical
communication skills, students can be trained with the problems of the second.