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If you take the square of the long side and add it to the square of the short side, you get the diagonal (hypotenuse) squared. Then just find square root of that. For example, if short side is 3cm and long side is 4cm:
9 + 16 = 25, so the diagonal would be the square root of 25 ie. 5.
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Earn +20 ptsQ: How do you calculate the diagonal of a rectangle?
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How do you calculate dimensions of a rectangle when given diagonal?
You don't - you need additional information. Many different rectangles can have the same diagonal. If you know the diagonal and one side (which must be LESS than the diagonal), you can use Pythagoras' Theorem to calculate the other side.
What is the diagonal if a rectangle is 9 x 12?
A 9 x 12 rectangle has a diagonal of 15.
Does the diagonal of a rectangle have to be perpendicular?
yes if you want it to be a rectangle
If a rectangle is 9cm by 11cm how long is the diagonal?
The diagonal is 14.21 cm
What is the diagonal of a rectangle with width 10cm and length 24cm?
The diagonal is 26cm
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