1.Point A has coordinates (-2,1),point B has coordinates (3,

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1.Point A has coordinates (-2,1),point B has coordinates (3,3).If line segment AN is rotated 90° clockwise about point B,what are the coordinates of the image of point
answer(1,8)
2.What is the maximum number of peices that can be cut from a paper circle with four straight cuts if none of the pieces are moved of folded between cuts?
answer:11

1..证明黄色三角全等（先征白色小三角和下面的黄色相似,拿三线八角吧.再用边角边证两个黄的全等）最后得出（3-（3-1）=1,3+3-（-2）=8）
2. 和小学四年级奥数一样,把一个平面切4刀,最多能把平面分成多少份.
让每个交点都是由两条直线相交而成的.
1刀（2份） 2刀（2+2=4份） 3刀（2+2+3=7份） 4刀（2+2+3+4=11份）……
以类似的题目都可以做啦~ 比如说6刀（2+2+3+4+5+6）

1.Point A has coordinates (-2,1),point B has coordinates (3, coordinates 英语翻译A POINT structure containing the x– and y–coordinates sp 英语翻译A point in the plane with coordinates (x,y),where x and name the coordinates of the image of each point after the in 英语翻译On the number line,point P has coordinate 1/2,and point (1) The coordinates of the three points A,B C on the plane a A relationship has reached a turning point and either today a ( )pin has a cover over its point The coordinates coordinates是什么意思 Sat数学题On a number line ,if point P has coordinate and point