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Types of quadrilaterals

Author:
Mathguru
On the screen, we can see some points in blue color and 4 points Q, R, S and T in black color. One quadrilateral is drawn by joining the given black points. Let us move these black points in such a way that they lie on the blue points and make a few different quadrilaterals. Let us observe what type of quadrilateral these points make under different conditions