Question 1 of 5
2 Points
What is the circumference of a circle with a diameter of 5 feet? Use 3.14 for
dos
O A. 7.85 ft
O B. 15.7ft
O C. 31.4ft
O D. 8.14 ft

Formula for the circumference of a circle:

C = πd    or     C = 2πr      

[C = circumference    π(pi)       d = diameter        r = radius(half the diameter)]

You know:

d = 5 feet        

and you're using 3.14 for π, so substitute/plug it into the equation

C = πd

C = (3.14)(5)

C = 15.7 feet       Your answer is B

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

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