Triangle abc is an isosceles triangle with xy = xz and angle X =70 degree. If bisectors of angle y and angle z meet at o,find angle xyz, angle oyz and angle yoz
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Answer:
∠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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angle XYZ = 55⁰
angle OYZ = 55⁰
angle YOZ = 90⁰
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