Ask Singapore Homework?

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



Question

primary 5 | Maths | Angles & Geometry
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
GK
GK

primary 5 chevron_right Maths chevron_right Angles & Geometry chevron_right Singapore

Please help me to solve this problem. Thanks!

Date Posted: 5 years ago
Views: 546
J
J
5 years ago
There isn't enough information in the question. The only possible answer is that

∠BAD = 180° - any one of the blue shaded angle or
∠BAD = 90° + ∠ACB


Unless, △ACD is an equilateral △.
Then ∠ACD = ∠ADC = ∠CAD = ∠BAC = 60°

Which ∠BAD = 180° - 60° = 120°

Check with the teacher to see if it should be an equilateral △ instead of an isosceles △
J
J
5 years ago
Have seen your suggested solution. But there's one problem. Are you very certain that AC is the angle bisector of ∠ BAE?
Jonathan Lim
Jonathan Lim
5 years ago
You're right. It's an assumption made based on the limited information of the question.
J
J
5 years ago
If that's the case then ABCE would be a square instead of a rectangle as you mentioned. And if that's the case, you would end up getting ∠DAC = 90°, which doesn't match the acute angle shown in the drawing
Jonathan Lim
Jonathan Lim
5 years ago
True

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Jonathan Lim
Jonathan Lim's answer
37 answers (A Helpful Person)
1st
Hope this helps :)