Answer :

dillonliyanage

Answer:

pythagoras theorem

[tex]a^2+b^2=c^2[/tex]

so we have a and b

12 and 9

so ... [tex]12^2+9^2 = 225[/tex]

take the square root to find c, since 225 is c^2

so √225 = c = 15

KurdishPotato

Answer:

B) 15

Step-by-step explanation:

This is a right triangle and in right triangles the square length of hypotenuse is equal to the sum of square length of base and side length

9^2 + 12^2 =√hypotenuse

225 = √hypotenuse

15 = hypotenuse

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