有一长方形的草地,长为360公尺,宽为250公尺。现在要在草地的四角和 周围种树,树与树之间的距离要相等,且所种的树的数量要最小,问树与树之间 的距离是多少?共种几棵树?
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If there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c? 1 -2 0 3

Identify the number as a rational or irrational.explain. 127

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.