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Oxana [17]
3 years ago
6

HELP PLS

Mathematics
1 answer:
Tems11 [23]3 years ago
8 0

Answer:

  C.  2 units

Step-by-step explanation:

The ratio of side lengths in an isosceles right triangle is ...

   1 : 1 : √2

If you don't already have this memorized, you can figure it out using the Pythagorean theorem:

  BD² = AD² +AB² = 1 + 1 = 2

  BD = √2 . . . . taking the square root

__

We are told that BD = DC, so we know the larger triangle is also an isosceles right triangle. This one has short sides of length √2, so the long side (BC) will have length (√2)×(√2) = 2.

The length of BC is 2 units.

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