Question 381632
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Hi,         
 30-60-90 right triangle ...long leg {{5*sqrt(3)}}}
  short leg is 5 and the hypotenuse is 10

CHECKING our answer by applying the Pythagorean Theorem
 a^2 + b ^2 = c^2 , where c is the hypotenuse
 25*3 + 25 = 100