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3 years ago

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When finding the perimeter of an equilateral triangle, if one side is known, can you find the total perimeter and why or why not

?
a. yes, angles are equal
c. no, sides are not equal
b. yes, sides are equal
d. angles are not equal

1 answer:

Lunna [17]3 years ago

8 0

It is B because an equilateral triangle has all 3 sides that are equal

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Consider the operation is $R_2\to -3R_2$ .

Given:

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To find:

Matrix results from the operation $R_2\to -3R_2$ .

Step-by-step explanation:

We have,

$\left[\left.\begin{matrix}1&0&1\\1&3&-1\\3&2&0\end{matrix}\right|\begin{matrix}-1\\-9\\-2\end{matrix}\right]$

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$\left[\left.\begin{matrix}1&0&1\\-3(1)&-3(3)&-3(-1)\\3&2&0\end{matrix}\right|\begin{matrix}-1\\-3(-9)\\-2\end{matrix}\right]$

$\left[\left.\begin{matrix}1&0&1\\-3&-9&3\\3&2&0\end{matrix}\right|\begin{matrix}-1\\27\\-2\end{matrix}\right]$

Therefore, the correct option is A.

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Answer:

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Step-by-step explanation:

Let

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Substitute y = 15 into

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