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Goshia [24]
2 years ago
9

Please help

Mathematics
2 answers:
kvasek [131]2 years ago
5 0

Answer:

14,7

Step-by-step explanation:

Use Pythagorean theorem.

a^2+b^2=c^2

a=√21^2-15^2= √216=14,7

nevsk [136]2 years ago
4 0

Answer:

216

Step-by-step explanation:

^

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