数学题Write the equation of the circle that contains the given

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/07/08 19:11:38

数学题<英文的>
Write the equation of the circle that contains the given point Pand has its center at the origin.
1. find x if the distance between(1,3)and (x,9)is 10.
2. find the area of the rectangle with vertices A(-3,0), B(-2,-1), C(1,2), and D(0,3).
请懂的朋友们帮我写出解答的过程~!万分感谢!~

1.find x if the distance between(1,3)and (x,9)is 10.
如果两个点坐标（1,3）和（x,9）的距离为10,求出x的值.
方程：(x-1)(x-1) + (9-3)(9-3)= 10*10 --------勾股定理
(x-1)的平方
2.find the area of the rectangle with vertices A(-3,0),B(-2,-1),C(1,2),and D(0,3).
求出上诉4个点所围成四边形的面积.
很简单的题目,你可以自己解一下.

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