What's the calculation for the diagonal lenth of a rectange?

Answer 1

Use the Pythagorean theorem: a squared (length) times b squared (width) equals c squared (diagonal).

By definition when you draw a diagonal through a rectangle, you've created two right triangles.

Answer 2

Length squared + height squared = diagonal squared

a^2 + b^2 = c^2

Answer 3

IF s = length + width
and d = diagonal length

d ≈ s√2

Answer 4

first you need to know the sides of it then draw a line through it making two triangles and use the hypotenuse formula a squared * b squared = c squared to find length of the diagonal

Answer 5

a^2 + b^2 = c^2 where a is one side of rectangle, b is the other width of the rectangle and c is the diagonal hypotenuse.

Answer 6

D(L, W)= sq. root of (L² + W²)
Because the diagonal of a recatngle forms two right triangles, you just use the pythagoreum theorum

This site will help you solve it:
http://www.mathnstuff.com/math/spoken/here/2class/80/math.htm#rectd

Answer 7

One side squared x the other side squared=the diagonal squared.

Take the square root of this number (unsquare it) and that's your diagonal.

Answer 8

Rectangle:
Area = Length X Width
A = lw

Perimeter = 2 X Lengths + 2 X Widths
P = 2l + 2w

Is it somewhere in there? It's from about.com.

Answer 9

diana got this one