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primary 5 | Maths
| Whole Numbers
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Date Posted: 1 month ago
Views: 40
Angle sum of three triangles - 80° - 180°
(The 180° equals the sum of the three unmarked angles since their vertically opposite angles result in angles on a line)
= 180° x 3 - 80° - 180°
= 540° - 80° - 180°
= 280°
(The 180° equals the sum of the three unmarked angles since their vertically opposite angles result in angles on a line)
= 180° x 3 - 80° - 180°
= 540° - 80° - 180°
= 280°
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Hope this helps
Date Posted:
1 month ago
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