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## Question

primary 5 | Maths
| Angles & Geometry

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I just seem to be stuck.

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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