Rectangle 3-4-5

The sides of the rectangle are in a ratio of 3:4. The length of the rectangle diagonal is 20 cm. Calculate the content of the rectangle.

Correct answer:

S =  192 cm2

Step-by-step explanation:

u=20 32+42=52 (3x)2+(4x)2=(5x)2  a=3/5 u=3/5 20=12 cm b=4/5 u=4/5 20=16 cm  S=a b=12 16=192 cm2   Verifying Solution:   d=a2+b2=122+162=20 cm d=u



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