ACTIVITY- Basic Geometrical Ideas
Objective:
To make a protractor,
Materials Required:
Some sheets of paper, scissors, geometry box, pencil, etc.
Procedure:
Draw a large semi-circle on a sheet of paper and cut it out. Mark 0 ° and 180 ° at the endpoints of its diameter.
2. Fold it to get a shape as shown alongside.
3. Open out the resulting shape to get a semicircle having a crease line in the middle.
Mark 90 ° on this crease line.
4. Fold the semi-circle twice to get a shape as shown below.
ACTIVITY- Basic Geometrical Ideas
5. Open out the resulting shape. You will get two more crease lines.
Write 45 ° on the first crease line to the right of 90 ° line and
(90 ° + 45 °)= 135 ° on the second crease line to the left of 90 ° line.
6. Fold the semi-circular paper thrice to get a shape as shown below:
