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sladkih [1.3K]
2 years ago
8

Find the value of x.

Mathematics
1 answer:
choli [55]2 years ago
7 0

Answer:

Step-by-step explanation:

By similar triangles, you get

3/BD = BD/7

BD^2 = 21

BD = √21

Now you use Pythagoras to get x

7^2 + BD^2 =  x^2

49 + 21 = x^2

60 = x^2

x = √60

7.746

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