Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Question

secondary 3 | E Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Nicole She
Nicole She

secondary 3 chevron_right E Maths chevron_right Singapore

Pls help me with this question. Thank you

Date Posted: 1 month ago
Views: 13

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Eric Nicholas K
Eric Nicholas K's answer
3855 answers (Tutor Details)
1st
Here. We cannot assume values from the diagram even though angle ACB is acute, though I think the setter intended angle ACB to be acute and BAC to be obtuse.
Nicole She
Nicole She
1 month ago
May I know is angle BAC is acute or obtuse
Eric Nicholas K
Eric Nicholas K
1 month ago
This one is not provided from the question (and is therefore a bad question being set by the examiner).

Once we find angle BAC, we can find the value of angle ACB numerically. One of the values will be more than 90 and the other will be less than 90.

If angle ACB is intended to be acute as per the pictorial, then angle BAC has to be one of the calculated values. Again, this is not actually provided in the question so I leave it to your judgement.

I suggest you add to the question “...and angle ACB is acute”.
Eric Nicholas K
Eric Nicholas K
1 month ago
In the “angle ACB is acute” case, your solution will be the 135 degrees version for angle BAC.
Nicole She
Nicole She
1 month ago
Ok thanks