Question

Really need some help! Pictures in comments, thank you!! :)

Answer 1

21

Answer 2

Oh! I understand how you got 21 now :P Dur. XD

Answer 3

2. Eh? :P

Answer 4

@Compassionate@Destinymasha @campbell_st @cwrw238 @e.mccormick @dumbcow @sammixboo
Just looking for someone to explain things to me... like, this for instance (very easy example) Triangle, two sides, they give you two numbers and ask you to find the third. I don't know how I am supposed to do that :( What do I do with this to get that number? This is what I am struggling with right now... Just knowing what I am supposed to do to figure out the problem.... :|

Answer 5

@Destinymasha

Answer 6

pythagorean thm

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

6^2 + 8^2 = c^2

Answer 7

Blah see that doesn't make sense to me :( I'm not understanding this :/

Answer 8

ok well thats how you find the answer haha

lets see if i can explain it better

every right triangle has a diagonal which is called the hypotenuse, it is also always the longest side

the rule then is that if you take the 2 smaller sides and square them and add them together, it is same as the longest side squared

Answer 9

.... Still not getting it XD LOL.... Blah :( So...... to square a number... you do 6x6 and 8x8... right? idk what squaring a number is :|

Answer 10

I looked it up.. and it said thats how many times you times the number by itself...

Answer 11

yes squaring a number is multiplying it by itself

--> 6*6 + 8*8 = c*c
where "c" is the long side

Answer 12

then that doesn't make sense.... because 6x6 = 36 and 8x8 = 64, so together that's 100...... O.o So the third side equals 100? I don't get it :(

Answer 13

no not quite but we are making progress :)

100 = c*c

what number times itself gives you 100

Answer 14

10 :P

Answer 15

correct

Answer 16

So.... Still confused :| you do the mystery number times itself.. like you did with the other two yeah? So... how do you end up with 10?.... why do you find the number that times itself to give you 100... I don't get it :( blah.... :(

Answer 17

because thats the rule, if you "square" the other sides of triangle, then you must "square" the 3rd side which in this case is the mystery number

Answer 18

so.... wouldn't you do 100x100? :P lol.....

Answer 19

no because 100 is the result of multiplying a number by itself

\[a*a +b*b = c*c\]
this only works with a=6,b=8,c=10

Answer 20

hmmm. ok. I kinda get it now. However.... I tried it on the next practice problem, which is a triangle with two sides of 5...... But this doesn't work for that... 5x5 = 25, 5x5 = 25 and 25 + 25 = 50. But... no number times itself equals 50 :\ back to totally lost :(

Answer 21

no you are not lost, you did it correctly

its true 50 is not a perfect square but 7*7 = 49 which is pretty close to 50
what do you know about square roots?

Answer 22

oh..... so it doesn't have to be exact? cause i thought about 7x7.. but it wasn't quite 50 -.- lol

Answer 23

And I know zip about them XD haha

Answer 24

ok yeah most of the time the numbers will not be exact

square root is the function used to find what number times itself equals a certain number

sqrt(49) = 7
sqrt(25) = 5
sqrt(9) = 3
etc...

Answer 25

anyway its on your calculator, if you plug in sqrt(50) you will get a decimal answer

sometimes the teacher will want you to leave it as sqrt(50) or the decimal

Answer 26

ok.. I'm kinda understanding now. What do you do if two of the sides are missing though? I've seen problems like that.

Answer 27

didn't know that XD

Answer 28

if 2 sides are missing, its impossible to find haha

is there an angle given?

Answer 29

well here is the example problem -

Answer 30

ok we can find x and y because the angles are given

this deals with special right triangles which have certain ratios

Answer 31

ok, so how do you come to that answer?... what do you do with the numbers to get there? this is the part that confuses me :P

Answer 32

you dont have to worry about that yet....you learn that later on in math

just accept that every triangle with 30 and 60 degree angles has the ratio 1:sqrt3:2

Answer 33

bahaha ok XD

Answer 34

Notice how the 7 is opposite the 30 degree angle, this means the diagonal y is 2 times 7 or 14

x then is 7*sqrt(3)

Answer 35

Thank you so much for helping me understand :b This has been killin me in math lately! And everyone gets too frustrated with me to help me and explain more..... :P

Answer 36

yw :)

Answer 37

:) I sadly have chores to do -.- and gone keep studying for my math test tomorrow :P Today I was just doing practice and learning new concepts... fun :P lol later! Thank you :)