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klio [65]
3 years ago
12

PLEASE PLEASE HELP. I’ve wasted so many points on this problem :(

Mathematics
1 answer:
aniked [119]3 years ago
5 0

Answer:

13 cm

Step-by-step explanation:

A^2+12^2=15^2

A^2+144=225

A^2=81

A=9

9x2=18

31-18=13 cm

Find the perimeter of a rectangle whose width is 3 cm and whose diagonal is 3 √5 cm long.

A^2+3^2=3√5^2

A^2+9=45

A^2=36

A=6

3+3+6+6=18 cm

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