Answer: all the ones that do not have a negative sign in front easy.
Which of the following is not a reason used in this proof?
1 answer:
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Well, split it into 3 shapes
21 x 10 = 210
3 x 6 = 18
2 x 6 = 12
210 + 18 + 12 = 240 square cm
imahe for more context
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