Find the value of x
1. two vertical angles have measure: x squared+18x and x squared+54.
2. the measures of the angles of a quadrilateral are: x, x+4, x+8 and x+12
3.the lengths of the legs of an isosceles triangle are 7x-13 and 2x+17
4.consecutive angles of a parallelogram have the measures 6x and 2x+20.
5. a trapezoid has bases of length x and x+8 and a median length 15.
you very much!

4.08%

step-by-step explanation:

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation: