Is there a known equation or formula for determining the diagonal measurement of a rectangle?

Answer 1

d = sqrt(L^2 + W^2)
where d= length of diagonal, L = length, and W = width

Answer 2

Yes, and it's called the Pythagorean Theorem. Remember that the diagonal of a rectangle, combined with two of the rectangle's sides, make a right triangle. Pythagoras's Theorem says that the square of the length of the hypotenuse -- in this case, the diagonal of the rectangle -- is the sum of the squares of the other two sides (the length and the width of the rectangle). So, if the rectangle has length L and width W, then the diagonal D can be found to be:

D = sqrt( L^2 + W^2 )

Hope that helps!

Answer 3

Everybody seems to be making heavy weather out of this. For example if the rectangle is 4x3 4 squared is 16
3 squared is 9 Add together you get 25. The square root of 25 is 5 and this will work for any rectangle Therefore the answer is 5 on the diagonal. As a footnote these particular measurements were used to construct instruments that gave ancient man a right angle.

Answer 4

There are a few ways to figure that out. By making the diagonal measurement in a rectangle you will get two right triangles. Assuming you know the length and width of your rectangle you can use the Pythagorean theorem.

Diagonal = square_root (width_squared + length_squared)

Answer 5

Yes the Pythagorean Theorem
is the formula to use. Where the square distance of one side plus the square distance of the other length equals the square of the diagonal. Thus take the square root of this calculation to get the diagonal.

Answer 6

Yeah its called Pythagorean Theorem. You take the length A and the width B then apply to this equation.

A² + B² = C²

C is the diagonal. To find C alone you take the square root of C²

Answer 7

Using Pythagoras Theorem,

diagonal^2 = length^2 + width^2
diagonal = SQRT(length^2 + width^2)

Answer 8

a^2+b^2 = c^2

Answer 9

Maybe you could use pythagorus's theorem is the angles of the rectangle are 90 degrees,otherwise you will have to use the Sin rule or the Cos rule.

Answer 10

Pythagorean Theorem.
a^2 + b^2 = c^2
where a and b are the sides of the rectangle(legs in right triangles) and c is the hypoteneus(slanted/longest/diagonal).
Either you learned it and you forgot, or you are gonna learn it, am I right?