Right-angled triangles: pythagorean theorem(1 of 2)

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Calculate and write the missing length for each of the right-angle triangles below. Round to two decimal places where necessary. The first one is done for you.

3 x 4  right angle triangle

5 cm


5 x 12 right angled triangle
   13 cm    

1 x 4 right angled triangle
   4.12 cm    

6 x 3 right angled triangle

   6.71 cm    

24 x 7 right angled triangle

  25 cm    

7 x 7 right angled triangle

   9.90 cm    

6 x 11 right angled triangle
   12.53 cm    

7 x 10 right angled triangle

   12.21 cm    

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Related Resources

The various resources listed below are aligned to the same standard, (8G07) taken from the CCSM (Common Core Standards For Mathematics) as the Geometry Worksheet shown above.

Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in real-world and mathematical problems in two and three dimensions.


Pythagorean Theorem


Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:

Understand and apply the Pythagorean Theorem


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