Question

ACT PREP QUESTION NEED HELP: Which of the following sets of 3 numbers could be the side lengths, in meters, of a 30 degree -60 degree -90 degree triangle???
A. 1,1,1
B. 1, 1 , sqr root2
C. 1, sqr root 2, sqr root 2
D. 1, sqr root2, sqr root 3
E. 1, sqr root 3, 2

Answer 1

@zepdrix @Nnesha

Answer 2

Hmm I can't think of a way to explain this one without just giving the answer :P

Answer 3

HI!!

Answer 4

neither can i because what you need to know is

ratio of a 30-60-90 right triangle are
\[1:\sqrt3:2\] for
short leg : long leg : hypotenuse

Answer 5

well i already know the answer because i am using a ACT prep book i just need to know how to figure it out for future

Answer 6

there is no other way to say it than just to say it
that actually happens to be one of your answer, but so would \[2,2\sqrt3,4\]

Answer 7

all i need to know is how i can remember problems like it for the ACT

Answer 8

or \[\frac{1}{\sqrt3},1,\frac{2}{\sqrt3}\]

Answer 9

i dont understand this problem at all..

Answer 10

it is always true that the ration of a 30-60-90 right triangle are \[\huge 1:\sqrt3:2\] what is what you need to know
it is a fact

Answer 11

*ratios

Answer 12

so its just basically a rule i need to know? no real figuring here?

Answer 13

so for example if the short leg hat measure \(10\) then the long leg would have measure \(10\sqrt3\) and the hypotenuse would measure \(20\)

Answer 14

you can derive it, but you don't want to have to do that on the fly
remembering is best

Answer 15

so its a rule they want me to know? an thanks!

Answer 16

yes, it is used in trig all the time

Answer 17

ah ok i haven't reached trig yet I'm in alg. 2 right now, thanks!

Answer 18

\[\color\magenta\heartsuit\]