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bezimeni [28]
2 years ago
9

Please help please I need help

Mathematics
2 answers:
vovangra [49]2 years ago
4 0

Answer:

hi

Step-by-step explanation:

we can do this with Pthyagorean teorem

{12}^{2}  +  {x}^{2}  =  {15}^{2}  \\ 144 +  {x}^{2}  = 225 \\  {x}^{2}  = 225 - 144 \\  {x}^{2}  = 81 \\  x =  \sqrt{81}  \\ x = 9 \: cm

BC is 9

hope it helps

have a nice day

MArishka [77]2 years ago
3 0

Answer:

9

Step-by-step explanation:

9 squared + 12 squared= 15 squared

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