1 Answer

Thanushka · Answer 1 · 2022-09-16T22:02:02+0000

Answer:

11

Explanation:

Find the length of the hypotenuse of the right triangle with sides 9 and 6

$a^(2) +b^(2) =c^(2) \\9^(2) +6^(2) =c^(2) \\81+31=c^(2) \\√(117) =c$

Use c and the height 2 to find the hypotenuse of the triangle with the dotted line

$√(117) ^(2) +2^(2) =c^(2) \\117+4=c^(2) \\221=c^(2) \\11=c$

the dotted line is 11

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