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primary 6 | Maths | Measurement
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Joel Su
Joel Su

primary 6 chevron_right Maths chevron_right Measurement chevron_right Singapore

Math

Date Posted: 4 years ago
Views: 399

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AC Lim
Ac Lim's answer
12438 answers (A Helpful Person)
1st
Hope this helps
Joel Su
Joel Su
4 years ago
The answer given was (b)2. How can you tell just by eyeballing it. Its obvious for the reflex angle and larger ones. But how can you tell if its 90° or 89°?
AC Lim
AC Lim
4 years ago
Yes. Good question. I always asked students to use ruler as guide to determine the right angle, 90°. Later I show you my method by pictures.
Joel Su
Joel Su
4 years ago
Also, it appears the picture is view at an angle not directly from the top. Won’t that be misleading as well? I feel it’s not a good question.
AC Lim
AC Lim
4 years ago
Yes you are right. From picture can effect the angle if picture taken not directly from top view.
AC Lim
AC Lim
4 years ago
Answer cant be 2. From eyeballing, have 3 angle more than 90.
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AC Lim
Ac Lim's answer
12438 answers (A Helpful Person)
This is how I determine right angle using ruler.
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AC Lim
Ac Lim's answer
12438 answers (A Helpful Person)
I suspect your answer sheet give wrong answer.