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HKMO1314GCQ1

Author:
Shepherd
Topic:
Geometry
Figure 1 shows a ABC . Construct a circle with centre O inside the triangle such that the three sides of the triangle are tangents to the circle. 圖一所示為一個 ABC 。試在該三角形內,構作一個圓心為 O 的圓,使三 角形三條邊均為該圓的切線。