Jibolo !!!!!'s answer to Amanda's Primary 6 Maths Ratio Singapore question.
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Hope this helps
Date Posted:
3 years ago
THANK YOU so much!
right idea, but need one more step.
question asked for shaded area …
179 is the unshaded area …
need to add back the 42 ….
total shaded area is 179 + 42 = 221 cm2.
for Amanda, do note that you cannot assume the lengths 10 cm & 3 cm which you have marked in pencil. treat all diagrams as "not to scale", meaning that they are not drawn accurately. cannot assume any length/angle & cannot use ruler/protractor to measure. if any information is not given, very likely that it is not required.
question asked for shaded area …
179 is the unshaded area …
need to add back the 42 ….
total shaded area is 179 + 42 = 221 cm2.
for Amanda, do note that you cannot assume the lengths 10 cm & 3 cm which you have marked in pencil. treat all diagrams as "not to scale", meaning that they are not drawn accurately. cannot assume any length/angle & cannot use ruler/protractor to measure. if any information is not given, very likely that it is not required.
You are right, thanks
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