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2 years ago

If triangle ABC is reflected over the x-axis, reflected over the y-axis, and rotated 180 degrees, where will point B' lie?

Mathematics

2 answers:

prisoha [69]2 years ago

7 0

Answer: (-1,4)

Step-by-step explanation: The orginal point B is at (-1,4) if you reflect it over x it becomes (-1,-4). Take that and reflect it over why it equals (1,-4). 180 degree rotation means (x,y) becomes (-x,-y). (1,-4) rotated 180 degrees equals (-1, 4).

melamori03 [73]2 years ago

6 0

Answer:

I saw someone say it was (-1,4). I´m taking the test right now so imma submit the answer as (-1,4) then let you know if its right

Step-by-step explanation:

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CaHeK987 [17]

Answer:

Option B. $20\ ft^{2}$

Step-by-step explanation:

we know that

The area of a triangle is equal to

$A=\frac{1}{2}bh$

we have

$b=4\frac{2}{3}\ ft$

$h=8\frac{4}{7}\ ft$

Convert mixed numbers to an improper fractions

$b=4\frac{2}{3}\ ft=\frac{4*3+2}{3}=\frac{14}{3}\ ft$

$h=8\frac{4}{7}\ ft=\frac{8*7+4}{7}=\frac{60}{7}\ ft$

substitute the values

$A=\frac{1}{2}(\frac{14}{3})(\frac{60}{7})\\ \\A=\frac{14*60}{2*3*7}\\ \\A=\frac{840}{42} \\ \\A=20\ ft^{2}$

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Answer:

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