A sheet of paper may be given to the child. Ask the child to fold the paper to form a
crease. Ask the child to fold the paper once again to form another crease so as to
intersect the former at a point. Let another line also be created by folding the paper.
Now explain to the child that the three lines are concurrent to each other as they
meet at a point and the point of intersection is called as the point of concurrence.
- Collinear points
Three or more points lying on the same straight line are said to be collinear points. If
the points do not lie on the same straight line, then they are said to be non-collinear
points.
Provide the child with a sheet of paper in which three embossed points lie on the same
straight line. Ask the child to fold the paper in such a way that the crease formed
passes through the three points. Since a straight line can be formed passing through
the three points, the given points are said to be collinear. If a straight line cannot be
formed using the three points then the points are non-collinear.
A, B & C are collinear points and D, E & F are non-collinear points.
- Parallel lines
Two non-intersecting lines on a plane which have the same distance between them in all
the corresponding points are said to be parallel lines. In other words, two lines are said
to be parallel to each other if the distance between them is equal at all points. The
child might be asked to explore the edges of a table in which the distance between the
edges is equal at all the points.
Also, a tactile diagram in which the distance between any two points of the lines is
always same be prepared and given to the child to explore.
C
A B C D E F
