12. Which of these is not a characteristic (property) of a polygon? A. A closed shape
B. Parallel faces
C. Made of straight lines
D. Two-dimensional

For what value of x does 4x = (1/8) x + 5?

The coordinates of vortex a’ are (8,4) (-4,2) (4,-,4) the coordinates of vortex b’ are (6,6)(12,-,12)(12,12) the coordinates of vortex c’ are(-2,,12)(4,12)(12,-4)

5, 6, 10 question: a. determine whether the side lengths form a triangle. (explain your reasoning) b. if it is a triangle, determine whether it is a right, acute, or obtuse triangle. (show your work)