Question

If s = 7 cm and t = 24 cm, what is the length of r?
25 cm
31 cm
38 cm
28 cm
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Answer 1

please you have to apply the Theorem of Pitagora

Answer 2

how do i do that?

Answer 3

hint:
what is:
\[\sqrt {{7^2} + {{24}^2}} = \sqrt {49 + 576} = ...?\]

Answer 4

ummm. i dont know what the lines above the numbers are

Answer 5

plese note that the Teorem of Pitagra states this:
\[{r^2} = {s^2} + {t^2}\]
so wecan write:
\[r = \sqrt {{s^2} + {t^2}} = \sqrt {{7^2} + {{24}^2}} = \sqrt {49 + 576} \]
since:
\[{7^2} = 49,\quad {24^2} = 576\]

Answer 6

oh i got it. sorry