Geometry & Trigonometry
Basic

Diagonal of a Rectangle

Length of the diagonal of a rectangle.

Formula

d=l2+w2d = \sqrt{l^2 + w^2}

Variables

lLength
wWidth

Example

A 3 × 4 rectangle has diagonal d = √(9+16) = 5.

Did You Know?

A rectangle's diagonal is found with the Pythagorean theorem, treating the sides as legs.

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