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loris [4]
3 years ago
5

This is geometry i need the answers to 4, 6, and 7

Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
5 0

Answer:

4. m of angle2 = 42

m of angle 1 = 88

m of angle 3 = 113

Step-by-step explanation:

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leva [86]

Step-by-step explanation:

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\therefore \: l =  \sqrt{ {h}^{2}  +  {r}^{2} }  \\  =  \sqrt{ {3}^{2} +  {3}^{2}  }  \\  =  \sqrt{9 + 9}  \\  =  \sqrt{2 \times 9}  \\   \therefore \: l= 3 \sqrt{2}  \: ft \\  \\ total \: surface \: area \: of \: cone \\  = \pi \: r(l + r) \\  = 3.14 \times 3(3 \sqrt{2}  + 3) \\  = 9.42 \times 3( \sqrt{2}  + 1) \\  = 28.26 \times (1.414 + 1) \\  = 28.26 \times 2.414 \\  = 68.21964 \\  \approx \: 68.2 \:  {ft}^{2}

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3 years ago
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