△abc ~ △defcan be read as which of the following?
triangle abc is congruent to triangle def.
triangle abc is similar to triangle def.
triangle abc is not similar to triangle def.
triangle abc and triangle def are the same triangle.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.