Friday, September 9, 2011

Maths Performance Task: Viva Voce (Nurain Iffah)

S1 (Viva Voce) Part A Question 3
video

(i)
To find the area of Square ABCD, we first multiply its length by its breadth, 6m x 6m, which would give us 36m^2.
After which, we subtract the shaded area from Square ABCD, to give us the unshaded area, which is also Rectangle AEGF. So, 36m^2 - 16m^2 = 20m^2.
As Rectangle AEGF’s length and breadth is unknown, we find the factors which make up its’ area, 20m^2.
1x20, 2x10, 4x5.
The question states that the length of the rectangle is 1m more than its breadth. Comparing the factors, only one pair of numbers have a difference of 1m, and that is 4x5. Hence, the numerical values of the length and breadth of the rectangle are 5m x 4m, respectively.
(ii)
Due to the values being in m, we have to convert it to cm to answer part (ii) of the question. To convert from metres to centimetres, we multiply the value by 100. So, 4x100 and 5x100 would give us 400cm and 500cm, respectively. We then multiply these numbers together, 400m x 500m, to get the area of Rectangle AEGF in cm^2, 200 000cm^2.

S1 (Viva Voce) Part B Reflection

In my opinion, one of the most difficult things I had to achieve while presenting my workings for the Viva Voce, was that I had to ensure my explanation was clear and concise, and that the person on the receiving end would be able to understand whatever I would say. Overall, this task has been

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