What is the length of the diagonal for the rectangular prism to the nearest whole unit?
LENGTH:12 cm
WIDTH:4 cm
HEIGHT:9 cm
A.16 cm
B.15 cm
C.13 cm
D.10 cm
i thinks its c. i think...
As you know, the diagonal of a 2-D rectangle is
√(x^2+y^2)
Similarly, the diagonal of a rectangular prism is
√(x^2+y^2+z^2)
So, since you have x,y,z just plug them in:
√(144+16+81) = √241 = 15.52
Looks like B to me.