anncandy
The perimeter of a rectangle is 10 cm, and its dimensions are tripled. What is the perimeter of the larger rectangle?
12 cm
20 cm
30 cm
10 cm
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mathteacher1729
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Do you know what the phrase "Dimensions are tripled" means? (like, can you draw a before and after picture)
lgbasallote
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sorry for that..continue the teaching @mathteacher1729 :)
anncandy
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It means that its tripled. I don't think i can draw it
mathteacher1729
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What, exactly, is tripled? Not trying to be a poo-poo head, depending on how you interpret this problem, there are different answers.
anncandy
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the perimeter of the rectangle
mathteacher1729
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The dimensions are not the perimeter.
The dimensions mean "the length and the width".
So if the length is say, 4 and the width is 1, then the perimeter is 4 + 4 + 1 + 1 |dw:1341673430917:dw|
mathteacher1729
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Now if you triple the dimensions, that means you triple the length and triple the width...
12 + 12 + 3 + 3 |dw:1341673481562:dw|
mathteacher1729
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|dw:1341673518998:dw|
anncandy
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Would it be 30?
mathteacher1729
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Why do you say 30?
anncandy
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12+12+3+3=30
mathteacher1729
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You got it. :)
anncandy
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Great! Thanks so much