Dilation on Coordinate Grid 1

① This example demonstrates the dilation (scaling) of a polygon on a coordinate grid, showing the original triangle and its scaled image side by side. ② The core mathematical concept is the dilation transformation in plane geometry, involving a scale factor, a center of dilation, and the property that corresponding points lie on lines through the center while the shape remains similar but changes size. ③ Construction details: The original triangle is built using the Polygon command, and the dilated triangle is generated with the Dilate command; a slider (scaleFactor) controls the scaling ratio, and a button (button1) with text objects (correctText/wrongText) provides interactive feedback for checking the user's understanding. Key objects include points A, B, C and their images A', B', C', as well as polygons poly1 and targetPoly. ④ Suitable for middle school or early high school students learning similarity transformations, and useful for classroom demonstrations or self-paced practice in geometric construction and dynamic exploration.