What are the coordinates of D when the quadrilateral is reflected across the line y=x?

See explanation

Step-by-step explanation:

Since the coordinates of D is missing, I assume the coordinates are: (4,-6).

To reflect in the line y=x, we simply swap the x and y-coordinates.

The mapping is

Therefore

Therefore the coordinates of D after a reflection in y=x is (-6,4)

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet