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Rina8888 [55]
3 years ago
14

The length of a rectangle is 36

Mathematics
1 answer:
Airida [17]3 years ago
7 0

Answer: 12cm

Step-by-step explanation:

They are similar, so we can set an equation of:

the ratio of length and width of the big triangle equal to the ratio of length and width of the small(second) triangle.

36:9 = x:3

36/9 = x/3

9x = 3(36)           by use the cross multiply

9x = 108

x = 12 cm

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