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3 years ago

8

Which transformation will always map a onto itself? A. A 90 degree rotation about its center. B. A reflection across one of its

diagonals. C. a 180 degree rotation about its center. D. a reflection across a line joining the midpoints of opposite sides

1 answer:

Lubov Fominskaja [6]3 years ago

6 0

i believe that the answer to that is c

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The semi circle and isosceles triangle have the same base AB and the same area. Find angle x. Show workout.

Nina [5.8K]

$r= \frac{AB}{2} \\ \\A_{semi\:circle }=\frac{r^2\pi}{2} \\ \\A_{triangle}=A_{semi\:circle }=\frac{r^2\pi}{2} \\ \\A_{triangle}= \frac{2r\times h}{2} =rh \\ \\\frac{r^2\pi}{2}= rh \\ \\h=\frac{r\pi}{2} \\ \\ \tan{x}= \frac{h}{r} = \frac{\frac{r\pi}{2}}{r} =\frac{\pi}{2} \\ \\x=\arctan{\frac{\pi}{2}}
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3 years ago

:(((( i can't get this one! Please help...

ValentinkaMS [17]

Answer:

4877 fish

Step-by-step explanation:

Each year, the fish population is multiplied by 1-6% = 0.94, so after 8 years it has been multiplied by 0.94^8 ≈ 0.609569.

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8000×0.609569 ≈ 4877 . . . fish

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lisabon 2012 [21]

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wait a minute for me to answer number 2

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3 years ago

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stiks02 [169]

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