__maths__>__Construction / Practical Geometry (basics)__>__Construction of Triangles (Fundamental Shape of Polygons)__### Construction of Triangle(ASA)

In this page, a short and to-the-point overview of constructing triangles with angle-side-angle (a side between given 2 angles) is provided.

*click on the content to continue..*

To construct a triangle, "angle-side-angle" is provided. Which of the following is required to construct the specified triangle?

- a compass to mark the given sides
- a protractor, compass and scale to mark angles and sides
- a protractor, compass and scale to mark angles and sides
- a set-square to mark parallel lines and angle

The answer is "a protractor, compass and scale to mark angles and sides"

To construct a triangle `/_\ ABC` with given "angle-side-angle" `70^@`, `6`cm, and `50^@` • Construct a line and mark side `bar(AB)` with a compass measuring `6`cm

• measure `70^@` angle and draw a ray from point `A`

• measure `50^@` angle and draw a ray from point `B`

• the two rays cut at point `C`.

`/_\ ABC` is constructed.

**Construction of ASA triangle** : use compass to measure lengths and protractor to measure given angle. Once the vertices are marked, join them to form the triangle.

*slide-show version coming soon*