1. Construct a circle. Use the [Circle Tool] to construct a circle.
2. Construct an isosceles triangle. Select the [Line Segment Ruler Tool], construct a chord arbitrarily on the circle, and connect the endpoints of the line segment to the center of the circle to form a triangle.
3. Hide the circle. After clicking on the circle, press [Ctrl H] to hide the circle, and the isosceles triangle is completed.
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