Three moons are in the same circular orbit around a planet. the moons are each 125,000 kilometers from the surface of the planet, located at points a, b, and c. the planet is 15,000 kilometers in diameter and m? abc=90? . how far is point a from point c?

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.

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the surface area is 124cm²

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length: 4cm

width: 9cm

height:   2cm

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