Drawing Triangles using Geometrical Instruments - Part 1

Example:

Draw an equilateral triangle with side 5 cm.

Step 1: Draw a straight line 5 cm long. Call it AB.



Step 2: Using a protractor draw an angle of 60° from Point A.

Each angle of an equilateral triangle is 60°.

Step 3: Using a protractor draw an angle of 60° from Point B.


Step 4: Mark the point where both these lines meet as C.



Each side of an equilateral triangle is of the same length.
Measure the lengths of lines AC and BC.
They should each be equal to 5 cm.
Using a protractor measure ∠ACB.
It should be equal to 60°.
Δ ABC is the required equilateral triangle.