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andreyandreev [35.5K]
3 years ago
15

#6.

Mathematics
1 answer:
Kamila [148]3 years ago
7 0

Answer:

x = 2

Step-by-step explanation:

Since the triangles are similar then corresponding sides are in proportion, that is

\frac{AB}{DE} = \frac{BC}{EF} , substitute values

\frac{7x}{7} = \frac{4}{x} ( cross- multiply )

7x² = 28 ( divide both sides by 7 )

x² = 4 ( take square root of both sides )

x = \sqrt{4} = 2

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