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3 years ago

If triangle ABC with vertices A(-2, -5), B(-3, 2), and C (1, -2) a right triangle?

1 answer:

7 0

Hello :
A(-2, -5), B(-3, 2), and C (1, -2)
calculate : AB² , AC² ,BC²
 AB² = ( -3 +2 )² + ( 2 +5 )² =50
AC² = ( 1 +2 )² + ( -2 +5 )² =18
BC² = ( 1 +3 )² + ( -2 - 2 )² = 32
by petagor rule : AB² = AC² + BC²....(ABC is a right triangle in : C )

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HELP PLEASEEE!!

Luden [163]

$\left[\begin{array}{ccc}2&6&3\\-5&1&4\end{array}\right]$

R1 ÷ 2 = $\left[\begin{array}{ccc}1&3&1.5\\-5&1&4\end{array}\right]$

R2 ÷ -5 = $\left[\begin{array}{ccc}1&3&1.5\\1&-0.2&-0.8\end{array}\right]$

R2: R1 - R2 = $\left[\begin{array}{ccc}1&3&1.5\\0&3.2&2.3\end{array}\right]$

R2 ÷ 3.2 = $\left[\begin{array}{ccc}1&3&1.5\\0&1&0.71875\end{array}\right]$

R1: R1 - 3R2 = $\left[\begin{array}{ccc}1&0&0.65625\\0&1&0.71875\end{array}\right]$

Answer: x = 0.65625, y = 0.71875

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3 years ago

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Minchanka [31]

Answer:

Step-by-step explanation:

(a). 270° clockwise or 90° counterclockwise:

(x, y) --------> ( - y, x )

(b). 270° counterclockwise or 90° clockwise:

(x, y) ---------> ( y, - x )

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3 years ago

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3 years ago

The 8 foot diameter circular table has a 4 foot wide extension. What is the total area with the extension? How does the area com

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4 years ago

Explain how you know that x^2-8x+20 is always positive. Please help.

IRISSAK [1]

Answer:

if you rearrange to complete the square, you get (x^2-4)^2 +4

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and 0 + 4 = 4, which is greater than 0, so positive

Step-by-step explanation:

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3 years ago