Instructions

Measuring angles with a folding ruler is handy both in hobbies and professional work. Here’s a brief guide on how to do it, including a downloadable table for reference.

Steps:

1. Unfold the first four sections of the ruler.
2. Adjust sections 1 and 2 to form a triangle.
3. Align the inner edge of the first section with the desired centimeter mark.

Angle Table:

• Angle	Centimeter on ruler
  20°	46.2 CM
  25°	47.8 CM
  30°	49.2 CM
  40°	52.9 CM
  45°	54.6 CM
  50°	56.2 CM
  55°	57.8 CM
  60°	59.3 CM
  65°	60.8 CM