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jeka94
3 years ago
11

If you're good at trig please help meeeee Show full working out ;)

Mathematics
1 answer:
Trava [24]3 years ago
7 0

We break down the area into two triangles - since we're given all their side lengths, we use Heron's formula: [area]=\sqrt{s(s-a)(s-b)(s-c)}, where s=\frac{a+b+c}{2}

[ABD]=\sqrt{(265)(115)(85)(65)}\approx 12975.92

[CBD]=\sqrt{(225)(125)(75)(25)}\approx 7261.84

[ABCD]=[ABD]+[CBD]\approx\boxed{20238\,\text{m}^2}.

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