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3 years ago

PLEASE HELP ME PLZ PLZ PLZ

Mathematics

1 answer:

Oksana_A [137]3 years ago

4 0

Answer:

Step-by-step explanation:

pythagoras theorem = a* + b* = c* ( by '*' i mean squared)

2* + b* = square root twenty

4 + b* = 20

b* = 16

b = 4

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