Draw a circle with three random points on the circle. Connect the points to form a triangle. Display the angles in the triangle. Use the mouse to drag a point along the perimeter of the circle. As you drag it, the triangle and angles are redisplayed dynamically, as shown in Figure. For computing angles in a triangle, see Listing.

(b) Exercise enables the user to drag vertices along the circle and display the angles in the triangle dynamically.
Listing


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