dedderick
If two sides of a triangle are 9 cm and 15 cm in length, which COULD be the measure of the third side?
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Jonask
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if we divide both sides by 3 we have
3 and 5 this is a triangle
3-?-5
dedderick
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ok how do i find the missing number
Jonask
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|dw:1359994377977:dw|
pythagoras
itsmeeQUENNIE
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yes ,, he's right .. use the pythagorean theorem to solve that triangle ..
dedderick
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so 5^2 + 3^2= c^2
itsmeeQUENNIE
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no .. it's not the equation ..
dedderick
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23,24,25,26
Jonask
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15^2=9^2+x^2
225-81=x^2
144=x^2
x=12
Jonask
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in normal cases you cud use the rate of a 3-4-5
triangle we noticed that we have
3-?-5
so its
3-4-5
hancere verse the calculation made b4 by multiplying by 3
4(3)=12
dedderick
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o the answer is ?
Jonask
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12
dedderick
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thns