kelly226
please helpppp?:/
Find the value of each variable. If your answer is not an integer, express it in simplest radical form



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kelly226
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Skyrider21
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x is 7.5 and y is 14

Skyrider21
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ps i sent you a message

kelly226
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ik:P how did u get those answers?

Skyrider21
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well x was half of the hypotenuse and you times x by the square root of 3.

Skyrider21
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to get y

kelly226
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oohh ok.. wb Y?

Skyrider21
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i dont know what that means

kelly226
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what bout Y? how did u get Y?

kelly226
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hah sorry..:/

kelly226
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ooh i mean X.. how do u get X? cuz that was for Y right?

zpupster
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that answer is wrong becasue when you have a 904545 triangle
the other sides are always equal.

Skyrider21
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oh, oops, i thought is was a 306090 triangle sorry

kelly226
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so how do u do a 90  45  45 triangle?

kelly226
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ik that y would be 15 sqrt of 2.. but how do i find X?

zpupster
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no
x and y will be the same

kelly226
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really? ooh.. how do u find it?

zpupster
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A= unknown angle, b =known angle 45 and c = 90
sinB =AC/AB=Opp/hyp

zpupster
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AC = AB x sinB

kelly226
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then i just substitute in?

kelly226
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u lost me...:/

zpupster
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label the angles in the drawing first

kelly226
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what drawing? mine?

zpupster
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yes

Skyrider21
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sup im back what did i miss?

kelly226
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umm.. confusing stuff.. that i dont get..

Skyrider21
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oh well on my reference sheet it says the hypotenuse is equal to x to the square root of 2 and the other two sides are x, so i guess both x and y =15

Skyrider21
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thats what it says for a 454590 triangle

kelly226
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really?! thaaanksss:D

Skyrider21
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your welcome, glad to help.

kelly226
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but how did u get 15?

zpupster
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15 is indeed the answer, but did you see how it was calculated

zpupster
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the sides you are looking for are AC or BC C being the right angle
the def of the sine of and angle is OPP/ hyp

kelly226
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no..

zpupster
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AB is the hyp or 15sprt2

zpupster
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did u get that part

zpupster
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what part are u missing

kelly226
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oh nvm.. i guess im not..thaaanks:)

zpupster
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anothr time then later