3 years ago

Please help me . weak in here

Mathematics

1 answer:

Charra [1.4K]3 years ago

3 0

9514 1404 393

Answer:

x = 10√3

Step-by-step explanation:

The Pythagorean theorem tells you ...

FB^2 = BC^2 +CF^2

FA^2 = FB^2 +BA^2

Substituting for FB^2, we have ...

FA^2 = BC^2 +CF^2 +BA^2 = x^2 +x^2 +x^2

FA^2 = 3x^2

FA = x√3 = 30 . . . . take the square root and substitute for FA

x = 30/√3

x = 10√3

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