Question

Someone please help me on thisss​

Answer 1

Consider. The right triangle FCB
FB^2 = x^2 + x^2 = 2x^2
Now considers triangle FBA
20^2 = 2x^2 + x^2
3x^2 = 400
X^2 = 400/3 = 133.33
X = sqrt 133.333
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