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Nyla
07-28-2013, 12:05 PM
Right triangle sat math

How can I find the length of the side AC in the triangle ΔABC below (Figure is not drawn to scale):

42

Thanks!!:)

Jack
07-28-2013, 12:18 PM
Right triangle sat math - Pythagoras' theorem


How can I find the length of the side AC in the triangle ΔABC below (Figure is not drawn to scale):

42

Thanks!!:)


Pythagorean theorem—or Pythagoras' theorem states :

"In any right-angled triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides(the two sides that meet at a right angle).

The theorem can be written as an equation relating the lengths of the sides a, b and c, as follows:

a^2 + b^2 = c^2

where c represents the length of the hypotenuse, and a and b represent the lengths of the other two sides.

Regarding your question about the length of side AC, you have to apply Pythagoras' theorem

AB^2 + BC^2 = AC^2 \Rightarrow AC^2=4^2 + 2^2=16+4=20 \Rightarrow AC=\sqrt{20}=\sqrt{4\cdot5}=2\sqrt{5}.

Hope these help!:):)

Nyla
07-28-2013, 12:19 PM
Thanks Jack!