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primary 6 | Maths
| Geometry
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Pls help. Tks
Date Posted: 4 years ago
Views: 306
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Hope this helps
Date Posted:
4 years ago
I just realised that after using the “angle at centre is twice the angle at circumference” and “opposite angles of a cyclic quadrilateral are supplementary” rules, this question is faulty at the Secondary 3 level.
How is it erroneous?
a is 40
b is 65
But at the other end of the 100 degrees, at F, it’s 100/2 = 50
40 + 65 + 50 = 155 which is not equal to 180.
Edit: never mind, I visualised the wrong connecting line when doing the property. Went to look at EFH instead of EFG.
b is 65
But at the other end of the 100 degrees, at F, it’s 100/2 = 50
40 + 65 + 50 = 155 which is not equal to 180.
Edit: never mind, I visualised the wrong connecting line when doing the property. Went to look at EFH instead of EFG.
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