Drag the blue point to A. 
Key Stage 3 (Junior Secondary) > 3.2 Measures, Shape & Space 度量、圖形與空間 > Simple Introduction to Deductive Geometry 演繹幾何簡介 >
Key Stage 3 (Junior Secondary) > 3.2 Measures, Shape & Space 度量、圖形與空間 > Simple Introduction to Deductive Geometry 演繹幾何簡介 >
Drawing a Circle passes through the 3 Vertices of a Triangle
