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primary 5 | Maths | Angles & Geometry
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Sarah Wong
Sarah Wong

primary 5 chevron_right Maths chevron_right Angles & Geometry chevron_right Singapore

I just seem to be stuck.

Date Posted: 3 weeks ago
Views: 20
Eric Nicholas K
Eric Nicholas K
3 weeks ago
ADC = 54
ACD = 54 since triangle is isosceles

ACB
= 180 - ACD
= 180 - 54
= 126 (since all angles on the same side of a straight line add to 180)

In triangle ABD,

ABD
= 180 - BAD - ADB
= 180 - 90 - 54
= 36 (since all angles in a triangle add to 180)

so ABC = 36

CAB
= 180 - ABC - ACB
= 180 - 36 - 126
= 18 (since all angles in a triangle add to 180)

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AC Lim
Ac Lim's answer
2682 answers (A Helpful Person)
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Hope this helps
Sarah Wong
Sarah Wong
3 weeks ago
Thanks so much for ur help