#I think Im right but my teacher said it's wrong. I want to verify

13 messages · Page 1 of 1 (latest)

sharp forgeBOT
frosty flame
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9x4*

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I made an error in that image

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.open

steel bramble
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could be "subtract to 6", aka the area of triangle is 6

frosty flame
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Look.

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Rectangle's area - triangle's area = 6cm^2

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So 24cm^2 - 6cm^2 = 18cm^2

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Now the numbers should be 9 and 4, right?

pine nova
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and whats "supposed" to be correct?

turbid river
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9x4 gives you the area
2x9 + 2x4 gives you the perimeter
the triangle, assuming it's a right-angled triangle and the 9 and 4 are the shorter sides, has 9 + 4 + sqrt(9^2 + 4^2) perimeter
the area of the triangle is 1/2 the area of the rectangle