SOLUTION: how do you find the lenght of the diagonal?

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Question 73858This question is from textbook Discovering Geometry
: how do you find the lenght of the diagonal? This question is from textbook Discovering Geometry

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
If we have a right triangle, (a triangle with a right angle) we can use Pythagoreans theorem:

Where a and b are the legs of the triangle and c is the hypotenuse (the diagonal). So if a triangle has legs of 3 and 4 we plug them into Pythagoreans theorem






So if I have legs of 3 and 4, I will have a diagonal of 5.