Question

Pythagorean help please!
Sue plans to paste two ribbons along the diagonals of the top surface of a rectangular gift box, as shown below.
What is the minimum length of ribbon that Sue would require?

Answer 1

the length of one diag is sqrt (12^2 + 9^2)

Answer 2

I tried that formula, like x^2=9^2+12^2 and I got some outrageous answer.

Answer 3

x^2 = 81 + 144 =225
x=15

Answer 4

wait.. how did you get 15 from 225?

Answer 5

15 is the sqr root of 225

Answer 6

get it?

Answer 7

ohhh! I understand now. Thanks! :D

Answer 8

But the only option is 225 cus it's multiple choice. So that's the right one?

Answer 9

there are 2 ribbons, so you need twice 15 or 30 cm

Answer 10

so its 30 ?