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love history [14]
3 years ago
11

Find the exact length of the third side.

Mathematics
2 answers:
KATRIN_1 [288]3 years ago
7 0

Answer:

The third side is sqrt(5)

Step-by-step explanation:

This is a right triangle so we can use the Pythagorean theorem

a^2+b^2 = c^2  where a and b are the legs and c is the hypotenuse

We know the legs are 1 and 2 and we are looking for the hypotenuse.

1^2+2^2 = c^2

1+4 = c^2

5 =c^2

Take the square root of each side

sqrt(5) = sqrt(c^2)

sqrt(5) =c

The third side is sqrt(5)

adell [148]3 years ago
6 0

Answer:

\sqrt{5} or 2.236

Step-by-step explanation:

The pythagorem theorm states that side 1^2 + side^2 = hypotenuse^2

2^2 + 1^2 = h^2

4+1 = h^2

5 = h^2

\sqrt{5} = \sqrt{h^{2} }

\sqrt{5} =h

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