The longer leg of a 30°-60°-90° triangle is . How long is the shorter leg?

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a 30, 60 90 degree triangle, is a 90 degree or right angled triangle. What you mean by longer leg and shorter leg, I can only guess as follows:

- the side opposite 90 degrees is called the hypoteneuse

- the side adjacent to the 90 degree angle iskonwn as the adjacent side( short side, horizontal). 

- the other side (vertical or long side ) is called the opposite side. 

for a right angled triangle, the only known way to caculate the sides is using pythagoras's thoerem  however, in order to do this you need to know the length of at least two sides. 

Step-by-step explanation:

side side side

side angle angle

angle side angle

side angle side

step-by-step explanation:

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.