Page 02). I Fig.6.40, 2X = 62, L XY2 = 54, 4 10 and zo ane the bisectors of LX12 and Lxy respectively of A x42, find Zozx and LYOZ. polven X Х 692
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As the sum of all interior angles of a triangle is 180º, therefore, for ΔXYZ,
∠X + ∠XYZ + ∠XZY = 180º
62º + 54º + ∠XZY = 180º
∠XZY = 180º − 116º
∠XZY = 64º
∠OZY = 32º (OZ is the angle bisector of ∠XZY)
Similarly, ∠OYZ == 27º
Using angle sum property for ΔOYZ, we obtain
∠OYZ + ∠YOZ + ∠OZY = 180º
27º + ∠YOZ + 32º = 180º
∠YOZ = 180º − 59º
∠YOZ = 121º
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