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You can read posting Sarin learns Perimeter, Area and Volume in school(Math Concept) to learn the concept of perimeter and area.
Read the posting on Sarin learns the concept of Fraction (mathematics concept) to understand the concept of Fraction.
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Upper primary school mathematics question UPQ333
The figure below is made up of a rectangle and a square. The overlapped portion of the two shapes is marked in orange. The area of the square is 2/5 the area of the rectangle. The area of the unoverlapped portion of the square is 1/6 the area of the unoverlapped portion of the rectangle. Given that the length of the square is 6 cm, find the area of the figure below.
The area of the square is 2/5 fraction of the area of the triangle
The area of the square = 6 × 6 = 36cm2
From the model
2 units = 36
1 unit = 18cm2
The area of the rectangle = 18 × 5 = 90cm2
The area of square plus rectangle = 36 + 90 = 126cm2
The area of unoverlapped square is 1/6 fraction of the area of the unoverlapped rectangle
The orange portion is same in area
The updated model
Per the model
5 units = 90 – 36 = 54cm2
1 unit = 10.8cm2
The area of orange portion of the figure = 36 – 12.8 = 23.2cm2
The area of the figure = 36 + 6 × 10.8 = 100.8cm2
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