1. The straight lines can be horizontal or vertical or slanting as shown below –

    The line AB is horizontal line. The line CD is vertical line. The line FG is slanting line as it is tilted slightly.

  2. This is a circle.

    A bangle, cap of a bottle are of circular shape.

  3. This is a square. The tiles, origami paper are of square shape.
  4. This is a rectangle. The windows, door are of rectangle shape.
  5. This is a triangle. The pyramids, traffic signs are of this shape.
  6. This is a curved line, it is not straight.
  7. If we make a pile of coins we get the shape of cylinder
  8. The cube has 12 edges and 8 vertices or corners.

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