Help me plss

Mathematics

1 answer:

sattari [20]3 years ago

3 0

I think the answer is 21

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3 years ago

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A triangle has a base of 9 feet and a height of 12 feet. What is the area of the triangle? A. 42 ft2 B.54 ft2 C.84 ft2 D. 108 ft

marishachu [46]

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3 years ago

Read 2 more answers

Please please help!!!!!

serious [3.7K]

Answer:

$188\sqrt{2}-8\sqrt{5}$ feet

Step-by-step explanation:

Well the perimeter is the sum of all sides that means

P= lenght + width + lenght + width

P=2(lenght + width)

$P=2(2\sqrt{8}+3\sqrt{5}+45\sqrt{8}-7\sqrt{5} )\\\\P=2((2+45)\sqrt{8}+(3-7)\sqrt{5})\\\\P=2(47\sqrt{8}-4\sqrt{5})\\\\P=2(94\sqrt{2}-4\sqrt{5})\\\\P=188\sqrt{2}-8\sqrt{5}$

6 0

4 years ago