Rectangle

There is a rectangle with a length of 12 cm and a diagonal 8 cm longer than the width. Calculate the area of rectangle.

Correct result:

S =  60 cm2

Solution:

a=12 cm u=8+b u2=a2+b2=122+b2  (8+b)2=122+b2 16b=80  b=80/16=5 cm u=a2+b2=122+52=13 cm u=8+b  S=a b=12 5=60 cm2



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