Isosceles right triangle

Contents of an isosceles right triangle is 18 dm2. Calculate the length of its base.

Correct result:

c =  8.4853 dm

Solution:

S=18 S=ab/2 a=b a=2 S=2 18=6 b=a=6 c=a2+b2=62+62=6 2=8.4853 dm

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