Drawing Triangles using Geometrical Instruments - Part 1

1. Draw an equilateral triangle with side 5 cm.


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

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

drawing an equilateral triangle
Each angle of an equilateral triangle is 60°.
Step 3: Using a protractor draw an angle of 60° from Point B.

drawing an equilateral triangle
Step 4: Mark the point where both these lines meet as C.

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