Question

Please help! I have no idea! D:

The information given represents lengths of sides of a right triangle with c the hypotenuse. Find the correct missing length to the nearest hundredth. A calculator may be helpful.



a = 20, b = 28, c = ?




A.
34.41


B.
35.45


C.
34.72


D.
35.88

Answer 1

\[a^2+b^2=c^2\\

20^2+28^2=c^2\]then take the square root to find c

Answer 2

Okay, so 20^2+28^2 is 1184 then i find the square root which is 4?

Answer 3

I definetly did something wrong.

Answer 4

for sure the square root of 1184 is not 4!!!

Answer 5

the 1184 is right

Answer 6

now find \[\sqrt{1184}\]

Answer 7

i would use a calculator

Answer 8

How do I find the square roots, again?

Answer 9

calculator
i use this
http://www.wolframalpha.com/input/?i=sqrt%28+20^2%2B28^2%29

Answer 10

It shows up as 4, or maybe im not seeing this right.

Answer 11

4√74

Answer 12

yeah, but look at the part that has the decimal

Answer 13

34.4?

Answer 14

yeah actually \[34.409\] wihch would round to \[34.41\]

Answer 15

just to summarize everything
how did we get 34.41

Answer 16

Like, what are the basic steps...I need to write this down x'D

Answer 17

squared the length of each side
added those numbers
took the square root of the result

Answer 18

https://www.youtube.com/watch?v=AuVi2ib-0qQ

Answer 19

\[\sqrt{20^2+28^2} \]

Answer 20

that is the formula

Answer 21

the √20^2+28^2 or the squared the length of each side added those numbers took the square root of the result

Answer 22

yes, they are the same

Answer 23

square, add, take the square root, gets encapsulated as \[\sqrt{a^2+b^2}\]

Answer 24

oooooh

Answer 25

thank you!