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secondary 2 | Maths
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Teacher can help me please
Date Posted: 1 year ago
Views: 299
By looking at your net, triangle's base = 20 cm and height = 24 cm.
Square length = 20 cm
Area of triangle = ½ × 20 × 24 = 240
Total 4 triangle = 960 cm²
Area of square = 20×20 = 400 cm²
Total surface area = 960 + 400 = 1360cm²
It this the answer?
Square length = 20 cm
Area of triangle = ½ × 20 × 24 = 240
Total 4 triangle = 960 cm²
Area of square = 20×20 = 400 cm²
Total surface area = 960 + 400 = 1360cm²
It this the answer?
Morning Mr. Lim. TQ very much
Why is the square 20cm? This is where I do not understand
Base of big triangle is 20cm. If we look at smaller triangle, base will be 10 cm and height = 24 in order to get 26 cm on hypotenuse.
26² = 24² + 10²
26² = 24² + 10²
TQ Mr. Lim,
Sorry I still unable to understand why the SQ is 20cm side
Sorry I still unable to understand why the SQ is 20cm side
Can I check, the answer I do is correct? Question lack of information.
See 1 Answer
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Hi, hope this helps. I saw the comments discussing about the reason of the side of base to be 20cm. I look into the question and confirm that the base and height in this question are variables. The question intends to get you try to draw one (any possible one) to scale and measure to calculate the surface area I believe.
Date Posted:
1 year ago
Another obvious combination would be swapping the value of b and h in my solution, as it still satisfies the 24^2 + 10^2= 26^2, then the area of square base be 48x48 , area of triangle 0.5x48x10, total surface area 3264cm^2
TQ sir
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