colored paper, pair of scissors, ruler, sketch pen, compass, pencil.
1.Draw a circle of any radius on a coloured paper and cut it. Let O be its centre.
2.Paste the cutout on a rectangular sheet of paper.[Fig 10(a)]
3.Take any point P outside the circle.
4.From P fold the paper in such a way that it just touches the circle to get a tangent
5.PA (A is the point of contact). [Fig 10(b)]. Join PA.
6.Repeat step 4 to get another tangent PB to the circle (B is the point of contact).
7.[Fig 10(c)]. Join PB.
8.Join the centre of the circle O to P, A and B. [Fig 10(d & e)]
9.Fold the paper along OP. [Fig 10(f)] What do you observe?
1.First draw a circle with centre O.
2.Take any point P outside the circle.
3.Click on point P to draw two tangents.
4.Click on point O to draw two perpendicular points
5.Click on triangle AOP to draw its image.
6.Drag the image of triangle AOP over triangle BOP.