Area of a rectangle

Calculate the area of a rectangle with a diagonal of u = 12.5cm and a width of b = 3.5cm. Use the Pythagorean theorem.

Correct result:

S =  42 cm2

Solution:

u=12.5 cm b=3.5 cm  a2+b2=u2  a=u2−b2=12.52−3.52=12 cm  S=a⋅ b=12⋅ 3.5=42 cm2

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Pythagorean theorem is the base for the right triangle calculator.
See also our trigonometric triangle calculator.

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