(- 9) + 6, 3, -3, 15, -15, 8 + (- 2), 6, -6, 10, -10, (- 4) + (- 12), -8, 8, 16, - 16, 9 - ( - 2 ), 11, 7, - 11, - 7, - 8 - ( - 4 ), 12, - 12, 4, - 4, - 15 - 8, 23, - 23, 7, - 7, It is a subset of a line with two endpoints, ray, line segment, line, point, 6 - 15, 21, - 21, 9, - 9, -18 - ( -6 ), -24, - 12, 12, 24, It is formed by two non collinear rays with common endpoint and common vertex, ray, angle, plane, line

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