leaaguyton1
leaaguyton1 leaaguyton1
  • 12-04-2018
  • Mathematics
contestada

I can’t find the missing side length, this is a special right triangle.

I cant find the missing side length this is a special right triangle class=

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mathmate
mathmate mathmate
  • 12-04-2018
Yes, this is a special right triangle such that the short leg (opposite 30 deg. angle) is half the length of the hypotenuse.

Therefore x=2*9=19,
and therefore, using Pythagoras theorem,
y=sqrt(18^2-9^2)=sqrt(324-81)=9sqrt(2^2-1^2)
=9sqrt(3)
=15.588 (to 3 decimal places).

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