Image of a Triangle by Central Symmetry

Author:
GreenMaths
You can move the vertices of the triangle and the point, O which is the centre of symmetry. Use the Polygon tool to draw where you think the image is. Click the Move tool (white arrow) if you want to move the points.
Try to work out the position of the image of the triangle before you reveal the answer. Move the point O and the vertices of the triangle and repeat.