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MatroZZZ [7]
3 years ago
15

An umbrella you bought is shaped like a regular octagonal pyramid with a side length of four feet and a slant height of feet. Es

timate the amount of fabric that the umbrella has.

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
8 0
The complete question in the attached figure

we know that
[<span>amount of fabric]=8*[area of lateral triangle side]
area of lateral triangle side=(1/2)*4*5----> 10 ft</span>²
so
[amount of fabric]=8*[10]----> 80 ft²

the answer is
80 ft²

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Let Q(-9,8) and S(9,-4) be the given points and let R(x, y) divides QS in the ratio 1:2.

By section formula,

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Here, x_{1}=-9, y_{1}=8, \text { and } x_{2}=9, y_{2}=-4 \text { and } m=1, n=2

Substituting this in the section formula

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To simplifying the expression, we get

\Rightarrow R(x, y)=R\left(\frac{9-18}{3}, \frac{-4+16}{3}\right)

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Hence, the coordinates of point R is (–3, 4).

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