Triangle Inequality
What is the possible length of the third side of a triangle?
Enter in the two given sides of a triangle. Then move point B around (or animate it using the button) to see the endpoint of the third side traced along the x-axis.
Is a triangle possible with the given sides?
See if you can create a triangle with the given sides. Change the side lengths in the app below and move the blue points to see if you can create a triangle.
To see if a triangle can be formed, click the button "Show answer"
Triangle Inequality Practice
Determine whether a triangle can be formed with the given side lengths.
Determine the range of the third side of a triangle given the lengths of the two other sides.