Question

Find the length of the missing side of each right triangle to the nearest tenth.
1. legs of 4 cm and 6 cm

Answer 1

please help or just tell em the answers or not

Answer 2

a^2 + b^2 = c^2

so 4^2 + 6^2 = c^2

Answer 3

16 + 36 = 52

so c^2 = 52

c = \[\sqrt{52}\] or 7.2

Answer 4

thanks can u help me more?? please:)

Answer 5

i'll try ;)

Answer 6

leg of 9 m, hypotenuse of 15 m

Answer 7

again a^2 + b^2 = c^2
this time, you know what a and c are, so we're looking for b

that makes b^2 = c^2 - a^2

b^2 = 15^2 - 9^2

b^2 = 225 + 81

b^2 = 306

b = \[\sqrt{306}\]

so b = 17.492 (not sure where you need to round it)

Answer 8

how do u do that check thingy?

Answer 9

the ^ or the \[\sqrt{?}\]

Answer 10

the check

Answer 11

for the square toot, you just go to equation, it's on the 4th row

Answer 12

wat equation??

Answer 13

where you type your reply, under that box, you have 'equation' 'drawing' and 'attach file'. If you click on equation, you'll find loads o useful things for math ;)

on the 4th row you see the square root sign, click on that and then chose the one with the x under it.
then you can fill in the number that has to be under it.

Answer 14

srry for making u think about where u put that can you just teach me how to do this stuff clearlly and easy?:)

Answer 15

explain how to calculate the sides of a triangle? i can try. it might not be always be very clear, cause i studied it all in a different languages, but math should work for everyone right? ;)

Answer 16

well yea

Answer 17

this only goes for right triangles btw.

But you always start with: a^2 + b^2 = c^2

and then it depends on what side you need to figure out the length of.
if you need to find out what the longest side is, than you canjust use the formula as it is. and fill in a and b, with the numbers that you do know.

so, if you know that 2 legs are 4 and 5, you can fill in:

a^2 +b^2 = c^2

4^2 + 5^2 = c^2

then calculate:

16 + 25 = c^2

41 = c^2

\[\sqrt{41}\] = c

Answer 18

does that make sense?

Answer 19

well yea sort of im tryin 2 copy it down

Answer 20

oh, here's a video of someone that explains it really really well: http://www.khanacademy.org/math/geometry-1/core-geometry/v/the-pythagorean-theorem

if you ever need to have something explained about math, that's the site to go. ;)

Answer 21

might be easier to follow, than just reading what i'm typing

Answer 22

no i get wat ur saying and wat about the word: hypotenuse? wat does thAT mean??

Answer 23

well, i kinda had to look it up too ;)

it's the longest side of the triangle, or the side that's not part of the right angle

Answer 24

oh ok well i get it but can u check my answers for me?? please

Answer 25

sure

Answer 26

omgosh nm thank u so so so so so so so so so and it goes on.... so much i understand it now so u dont need to check my answers ur so great!!:)

Answer 27

haha, you're very welcome.... it's nice to see someone actually trying to figure it out, instead of just wanting the answer. :)

Answer 28

but i have one more question...... how do u round or estimate the answer?

Answer 29

do you mean how i calculate that square root? i kinda use a calculator for that. ;)

or do you mean, when they say that you need to round to the nearest ten?

for example, if it says: 8.67, then you round it to 8.7

if it says 4.21, you round it to 4.2.

if the next number is lower than 5, you round it down, if it's higher than 5, you round up.

Answer 30

oh yes now i remember.... and if it is a hole number then just leave it the same?

Answer 31

yes, exactly :)

Answer 32

ok well thank you so much u were a great help!!:)

Answer 33

no problem at all