O is the center of the circle shown, which has radius 18 cm. A, B, C and D are points of the same circle. If arc AB has a measure of 80 degrees, arc DC has a measure of 90 degrees, and arcs BC and AD have the same measure, then what is the length of arc BC?​

22

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:

believe it or not anna is correct good job anna give me a fist bump there u go gal