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olga55 [171]
3 years ago
13

You guys I need help on this.

Mathematics
1 answer:
fomenos3 years ago
7 0

Answer:

2

Step-by-step explanation:

All the triangles are similar, so ...

... 4/y - y/9

... 36 = y² . . . . . multiply by 9y

... 6 = y

From the Pythagorean theorem, ...

... x² = 4² + y² = 4² + 6²

... x² = 52 = 4·13

... x = √(4·13) = 2√13

Green Box: 2

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What two theorems are being used ?
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EleoNora [17]
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Hey there!

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Obtuse: has an angle that is greater than 90 degrees.

As you can see, we have one angle that is greater than 90, which is 100.

Therefore, this is an obtuse triangle.

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