nanaheads
In the figure, ΔABC ~ ΔDEF. Solve for x.
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nanaheads
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Grazes
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Make a proportion based on the fact that they are similar. Turn the bottom triangle until the triangles match and compare the sides. The proportion should be 16/8=x/3
huneya
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do cross multiplication
nanaheads
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So the answer should be b=4?
Grazes
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|dw:1343161960665:dw|
Try again.
huneya
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16x 3 /8
Grazes
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Nana. Did you check your work?
nanaheads
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So it's 6?
huneya
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yes
nanaheads
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Thank you so much! Can you help me with another one?
Grazes
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Good job. Give yourself a pat. Do you understand how I made the proportion, though?
nanaheads
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Yes I did!
nanaheads
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Grazes
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Try to make a proportion yourself after matching up the triangles. I'll tell you whether you got it right or not ;)
huneya
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x-3/4 = 12/3
Grazes
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Huneya. Please try to help her without guessing for her :/
At any rate, huneya's attempt was wrong.
huneya
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no its not @Grazes
nanaheads
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I got 16... I think that's wrong.
nanaheads
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so it's 19? I was close.
Grazes
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Huneya's proportion was correct.. to a degree. It was only right because they were special similar triangles
Grazes
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|dw:1343162820034:dw|
That'd be the correct proportion if you needed to show your work on a test.
nanaheads
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So it's 19?
Grazes
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Yep.