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secondary 2 | Maths
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Date Posted: 2 years ago
Views: 342
2.5：4.5 : 7 = 5 : 9 : 14
OB = ⁵⁄₁₄ × 10 = ²⁵⁄₇
sin(θ) = DB / OB = 2.5/(²⁵⁄₇) = 0.7
θ ≈ 44.4°
OB = ⁵⁄₁₄ × 10 = ²⁵⁄₇
sin(θ) = DB / OB = 2.5/(²⁵⁄₇) = 0.7
θ ≈ 44.4°
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Key concepts tested here:
1. Vertically opp angles
2. Similar triangles (AA similarity)
3. Ratio of Corresponding sides of similar triangles are equal
4. Substitution and simplification
5. Basic trigonometric ratio (sine is O/H)
1. Vertically opp angles
2. Similar triangles (AA similarity)
3. Ratio of Corresponding sides of similar triangles are equal
4. Substitution and simplification
5. Basic trigonometric ratio (sine is O/H)
Date Posted:
2 years ago
Thank you so much
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