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charle [14.2K]
3 years ago
15

pls show steps and formula

Mathematics
1 answer:
Sonbull [250]3 years ago
8 0

Step-by-step explanation:

the correct formula for this is the heron's formula

which states that s=√s(s-a)(s-b)(s-c). Where s is a+b+c all divided by 2

s=√(13.5-12)(13.5-9)(13.5-6)

s=√(1.5)(4.5)(7.5)

s=√50.625

s= 7.11 or 7 to the nearest square unit

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