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Eddi Din [679]
4 years ago
8

What is a sphere made up of?

Mathematics
1 answer:
soldier1979 [14.2K]4 years ago
7 0
In my opinion, the correct answer among the choices listed above is option B. A sphere made up of many circular cross sections. When you cut through a plane at any angle or side, you will see that the plane made will always be a circle.
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A person on the ground looks up at an angle of 28° and sees the top of a tree and the top of a building aligned. The tree is 20
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Answer:

21.27 meters.

Step-by-step explanation:

Please find the attachment.

Let H and h represent height of building and tree respectively.

We have been given that a person on the ground looks up at an angle of 28° and sees the top of a tree and the top of a building aligned. The tree is 20 m away from the person and the building is 60 m away from the person.

We know that tangent relates opposite side of a right triangle with its adjacent side.

\text{tan}=\frac{\text{Opposite}}{\text{Adjacent}}

\text{tan}(28^{\circ})=\frac{H}{60}

60\cdot \text{tan}(28^{\circ})=H

60\cdot 0.531709431661=H

H=31.90256589966\approx 31.90

Similarly, we can find height of the tree.

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20\cdot\text{tan}(28^{\circ})=h

20\cdot 0.531709431661=h

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H-h=21.27

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