Question

Can someone please help me with the Geometry question?

Answer 1

I know to use the Pythagorean Theorem, but don't quite know what else.

Answer 2

the Trip ABC is a right angled triangle right? one of the angles is 45degrees which means the other angle is = ?

Answer 3

@Emah

Answer 4

45

Answer 5

so that mean BC is = AB

you Add AB+BC = is the longer trip

Answer 6

then AC would be the hypotenuse... you can either use Trig ratios or pythagoras theorem but calculator would be quickest i think

Answer 7

AC is the shorter trip you subtract from the longer trip

Answer 8

I jsut don't understand how to find the lengths.

Answer 9

if you have a right angle and the other angle is is 45 degrees that means the other angle would also be 45 degrees and then the two sides are equal.....

Answer 10

so AB is 200 miles then BC would also be 200 miles

Answer 11

then to get hypotenuse you have to remember your trig ratios SOH CAH TOA

Answer 12

Oh ok.. then I just find the hypotenuse...

Answer 13

but there is a short cut for "special angles" which is 45 degrees is one of them but unless you have covered the theory for that you might get confused.

Answer 14

yeah hypotenuse you can use 200 / Sin of 45 degrees

Answer 15

Ok the answer I got is 282.85

Answer 16

yeah :)

Answer 17

now try to solve the second question

Answer 18

you already know BC

Answer 19

and you know two angles 90 and 30 ... find the other angle

Answer 20

60..

Answer 21

then use what information you have to get trig ratios SOH CAH or TOA to get the other sides

Answer 22

For the second question I got 146.4. Is that right?

Answer 23

how did you get to that

Answer 24

lol did I do somthing wrong? The hypotenuse is always 2 the length of the shorter side. Then the longer leg is the shorter leg to the sqrt. of 3. then I subtracted.

Answer 25

i think so :D

Answer 26

oh oops...

Answer 27

using that pythagorean ratios is the best and fastest, it's good to know :)

Answer 28

I don't know those trig ratios..

Answer 29

-"The hypotenuse is always 2 the length of the shorter side"

No, the hypotenuse is the square of the sum of the squares of the other 2 sides.

What you're thinking of is the bisector of an angle. It's twice as long between the center of the triangle to the vertex then it is from the center of the triangle to the center of the base.

Answer 30

@Emah you just used those ratios..... u have right answer

Answer 31

@qweqwe123123123123111 she's only up to trig ratios for right angles... what you posted is different from what she is trying to learn and might just confuse her even more :S

Answer 32

Ok I am confused.. I thought you said I was wrong

Answer 33

and special angles 30-60 45 90 degrees...

Answer 34

no i didn't... i asked how you got them and u showed me your answer and u used the bes tway of getting it :D

Answer 35

Oh ok.. so its right? That is good. lol Yeah lol this is only geometry so its not too advanced or complicated

Answer 36

yep :) .... just try to learn the theory behind it... i think Qweqwe posted something to explain it a bit more but if you know the theory (based on Pythagora), it also helps later on.... but for now you can just memorize for 45 degrees, ratio is 1,1 and sqareroot of 2 and for 30-60 degrees it's 1, 2 and sq root of 3 (2 being the hypotenuse)

Answer 37

@miszery, I was addressing her claim that the hypotenuse "is always 2 the length of the shorter side".

That claim is not only incorrect, I also believe she was misinterpreting the 2:1 ratio I indicated.

It would do her no good to let her persist in her belief without correcting her.

Answer 38

@qweqwe123123123123111 she was talking about the 30-60 degree ratios. but i knew what she meant since she got the right answer. :D

Answer 39

Emah said "lol did I do somthing wrong? The hypotenuse is always 2 the length of the shorter side. Then the longer leg is the shorter leg to the sqrt. of 3. then I subtracted. "