OML Search

Construct A Triangle Given Two Sides And An Angle

Related Topics:
More Lessons for Grade 6

Math Worksheets

In this lesson, we will learn how to construct a triangle given two sides and an angle between them (SAS). In order for the triangle to be unique, the angle given must be between the two given sides.


Construct a triangle PQR given that PQ = 4 cm, PR = 5 cm and = 120˚.


Step 1:

We construct a 60˚ angle and get the supplementary angle, which is 120˚.

Step 2 :

We construct 2 line segments of 4 cm and 5 cm from P respectively. Then, draw a line from Q to R to form the triangle.

This video shows how to construct a triangle given two sides and the included angle (SAS).

Construction: Triangle - 2 Sides, 1 Angle
A demonstration of how to construct a triangle, give the lengths of two sides and the angle between them.


Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

OML Search

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.

[?] Subscribe To This Site

follow us in feedly
Add to My Yahoo!
Add to My MSN
Subscribe with Bloglines