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primary 6 | Maths | Geometry
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Luis Tan
Luis Tan

primary 6 chevron_right Maths chevron_right Geometry chevron_right Singapore

I found this problem in a math magazine. However, I lost the issue that explained this answer. Please help.

Date Posted: 10 months ago
Views: 117

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Nia Mokhtar
Nia Mokhtar's answer
3 answers (A Helpful Person)
1st
Firstly you have to find the value for OCD and ODC. Both are 54° (since they are isosceles).

Every straight lines = 180° in total.

Then find values for triangle AOD and BOC. Note that the interiour angles are defined by :-

(n-2) × 180° where n is the number of edges.
Eric Nicholas K
Eric Nicholas K
10 months ago
Triangle AOB is sadly not isosceles though.
Nia Mokhtar
Nia Mokhtar
10 months ago
Thank you brother
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Eric Nicholas K
Eric Nicholas K's answer
3916 answers (Tutor Details)
My approach for this question uses an upper secondary maths method. I have long thought about the geometrical aspects of the diagram and tried all avenues to approach it the easier way, but could not find one in time.