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primary 5 | Maths | Angles & Geometry
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Mohd Iswady
Mohd Iswady

primary 5 chevron_right Maths chevron_right Angles & Geometry chevron_right Singapore

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Date Posted: 4 weeks ago
Views: 10

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Since triangle ABD is equilateral, angle ADB=60°
Angle BDC = 180 - 60 = 120°
Angle CBD = 60 ÷ 2 = 30°
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