Intelligent Geometry

4. Be placing two same squares side by side, we can get a——
8. the sum of the interior angles is 360 degrees. It include trapezoid, square, parallelogram and so on.
9. two lines never cross
13. the sum of the interior angles is 180 degrees
14. it is similar with vertical line, but the direction is different.
16. It can be roated 90 degrees, and it will turn into a horizontal line.

1. the shortest distence from a point to a line
2. the shorter two sides in a triangle
3. If change its angle, it.will turn into a rectangle.
5. All angles and sides are equal.
6. the only closed shape with countless axis of symmetry
7. crucifix, T-junction
10. the longest side in a triangle
11. the bottomest side, circle does not have it.
12. only have o
15. If we change its angle, it will turn into a square, and it is a special pallelogram