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Elena L [17]
3 years ago
12

A point at (−8, −9) is rotated 270° counterclockwise about the origin. What are the coordinates of the resulting image?

Mathematics
2 answers:
Natali5045456 [20]3 years ago
7 0
(-8, -9) is in the third quadrant.

If you know the Unit Circle, 270 degrees goes directly downwards. 
                                                           
                                                           
                                                           |
                                                           |
                                                           |
                                                           |
                                                           |
                                                           |
                                                           |
                                                           |  90 degrees
                                                           |
                                                           |
------180 degrees------------------------------------------------------0 degrees--------
                                                           |
                                                           |
                                                           |
                                                           |
                                                           |
                                                           |
                                                           |
                                                           |
                                                           |  270 degrees
                                                           |
                                                           |
                                                           |
                                                           |

So rotating the point that same distance (or angle whatever) is technically just going up 18, since the distance from your y-value to the x-axis is 9.

(-8, 9)
posledela3 years ago
3 0

Answer:

(-9,8)

Step-by-step explanation:

A point at (−8, −9) is rotated 270° counterclockwise about the origin.

Rotation about origin with 270° counterclockwise.

Coordinate change:

(x,y)\rightarrow (y,-x)

Therefore,

(-8,-9)\rightarrow (-9,8)

The resulting coordinate is (-9,8)

We can also see in attachment for rotation of coordinate.

Hence, The image of coordinate after rotation 270° counterclockwise about origin is (-9,8)

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