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ΔημοσίευσεFedora Anania Τροποποιήθηκε πριν 10 χρόνια
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Som 25 en 31
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Som 25a Gegeven is ΔABC met A = 90°, C = 55°, AE ┴ BC en AD = BD Bereken A 1 In Δ ABD: A 1 = B (gelijkz. Δ) In Δ ABC: A 123 = 90°, C = 55° Dus B = 180° - 90° - 55° B = 35° Conclusie: A 1 = 35°
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Som 25b Gegeven is ΔABC met A = 90°, C = 55°, A = B = 35° AE ┴ BC en AD = BD Bereken A 2 In Δ ACE: C = 55°, E 2 = 90° Dus A 3 = 180°-90°-55° A 3 = 35° Dan is A 2 = 90° - A 1 – A 3 Dus A 2 = 90° - 35° - 35° = 20°
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Som 31 A) Bereken D 1 : D 1 = B = 68° (F-hoeken) B) Bereken C 2 : C 12 = E 2 (F hoeken) E 2 = 180° - A – D E 2 = 180° - 54° - 68° = 58° Dus C 12 = 58° Dus C 2 = 58° - 30° = 28°
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Som 31 C) Bereken D 2 In Δ EDC is C 2 = 28° E 1 = ? E 2 = 58° E 1 = 180° – 58° = 122° D 2 = 180° – E1 – C2 D 2 = 180° – 122° – 28°
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