siting's answer to Rin's Primary 6 Maths Geometry Singapore question.
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angle ABD = 90-60 = 30 ( angles in isos triangle)
angle BDC = 180-60 = 120 (angles in a straight line)
angle y = 180-120-30 = 30 (angles in a triangle )
angle BDC = 180-60 = 120 (angles in a straight line)
angle y = 180-120-30 = 30 (angles in a triangle )
Date Posted:
4 years ago
Thx!◉‿◉
no worries :D
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