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The base of a solid oblique pyramid is an equilateral triangle with a base edge length of 14 units.

What is BC, the height of the pyramid?

A. 7 units
B. [tex]7 \sqrt{2}[/tex] units
C. 14 units
D. [tex]14 \sqrt{2}[/tex] units

Sagot :

To determine the height [tex]\( BC \)[/tex] of the oblique pyramid, we need to evaluate the provided options with respect to the given base of the pyramid. Here is the reasoning step-by-step:

1. The base of the pyramid is an equilateral triangle with each side measuring 14 units.
2. We need to identify the height [tex]\( BC \)[/tex] of the pyramid from the given options:
- [tex]\( 7 \)[/tex] units
- [tex]\( 7 \sqrt{2} \)[/tex] units
- [tex]\( 14 \)[/tex] units
- [tex]\( 14 \sqrt{2} \)[/tex] units

We systematically evaluate these options:

- Option 1: 7 units
- Option 2: [tex]\( 7 \sqrt{2} \)[/tex] units
- Option 3: 14 units
- Option 4: [tex]\( 14 \sqrt{2} \)[/tex] units

Now, we analyze each option:

1. First option: 7 units
- The height of 7 units seems plausible; however, it does not necessarily conform to the expected ranges of heights based on initial base considerations and typical proportional relationships in a pyramid.

2. Second option: [tex]\( 7 \sqrt{2} \)[/tex] units
- [tex]\( 7 \sqrt{2} \)[/tex] approximately equals 9.899494936611665 units which is another possibility, often seen in geometric pyramid configurations because it suggests a height derived from a more complex relationship than just simple halving of segments.

3. Third option: 14 units
- A height of 14 units is straightforward but potentially might be overestimating because it matches the base length but does not indicate additional geometric sophistication.

4. Fourth option: [tex]\( 14 \sqrt{2} \)[/tex] units
- [tex]\( 14 \sqrt{2} \)[/tex] approximately equals 19.79898987322333 units, and such heights typically arise from specific diagonal manipulations and transformations in pyramid discussions, reflecting advanced, elongated configurations.

After evaluating the options quantitatively and geometrically, we infer that each option cites particular mathematical feasibilities, yet:

- Only the [tex]\( 7 \sqrt{2} = 9.899494936611665 \)[/tex] units and [tex]\( 14 \sqrt{2} = 19.79898987322333 \)[/tex] units provide tangential solutions derivable from distinct patterns focusing on oblique inclinations.

Thus, the correct height of the pyramid [tex]\( BC \)[/tex] is:
- [tex]\( 7 \sqrt{2} \)[/tex] (approximately 9.899494936611665 units) or [tex]\( 14 \sqrt{2} \)[/tex] (approximately 19.79898987322333 units) based on the constraints and possible options available to the geometric formulation under typical interpretations of the oblique pyramid's height setup.

Therefore, the height [tex]\( BC \)[/tex] of the pyramid is [tex]\( 7 \sqrt{2} \)[/tex] units or [tex]\( 14 \sqrt{2} \)[/tex] units.