Testing Side Lengths to Form Triangles

Testing Side Lengths to Form Triangles

Discover whether or not a triangle can be formed from three different side lengths. Explore animated answers in this activity.

GeoGebra Content Team

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Putting It All Together

Answer these open ended questions on your own or with others to form deeper math connections.

Öppen fråga 1

Triangle has two sides, length 5 cm and 8 cm. Give three possible lengths for the third side.

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Öppen fråga 2

Triangle has two sides, length 5 cm and 8 cm. Give three lengths for the third side that are not possible.

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Öppen fråga 3

Triangle has two sides, length 12 cm and 30 cm. What is the longest possible length of the third side? What is the shortest possible length of the third side?

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Öppen fråga 4

How can you tell if three different lengths will form a triangle?

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