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Question
primary 5 | Maths
| Angles & Geometry
One Answer Below
Anyone can contribute an answer, even non-tutors.
I just seem to be stuck.
Date Posted: 4 years ago
Views: 279
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)
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)
See 1 Answer
done
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Hope this helps
Date Posted:
4 years ago
Thanks so much for ur help
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