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oksian1 [2.3K]
3 years ago
15

Find the surface area of the composite solid.

Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
6 0
The answer is 170




Explanation you multiply 5x5x4 and then add 7 but put a zero so 70
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Answer:

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The shaded part plus the right triangle BCD makes a quarter circle, so you can find the area of the quarter circle minus the triangle.

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Again, this is a quarter circle. So, you can add the lengths of arc BD and the line segment BD.

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The hypotenuse of the right triangle will be sqrt(8*8+8*8), or 8sqrt(2).

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