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primary 5 | Maths
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Date Posted: 5 years ago
Views: 219
Angle ECF = 180 degree - 42 degree = 138 degree
Alternative answer,
Angle ECF = 90 degree + 48 degree = 138 degree (sum of two opposite interior angles in a triangle = exterior angle)
Alternative answer,
Angle ECF = 90 degree + 48 degree = 138 degree (sum of two opposite interior angles in a triangle = exterior angle)
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Straight line is equals to 180 degree.
Date Posted:
5 years ago
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